Sunday

April 20, 2014

April 20, 2014

Number of results: 19,925

**Physics**

A charged particle is moving downward with an initial speed of 5 × 106m/s when it encounters a uniform magnetic field that points east to west. (a) If the initial force on the particle is to the north, is the particle positive or negative? (b) If B = .25 T and the particle has...
*Thursday, March 21, 2013 at 4:17pm by Lindsey*

**Maths mst**

Question – 3: Consider a particle moving according to the velocity function, v(t) = 2a-3exp(-2t)+2/t+2,for t>0. (a) If the net distance,d,covered by the particle in the time interval,[0,3],is 20,find the value of a. What is the terminal velocity of the particle?. (b) Find ...
*Saturday, May 10, 2008 at 5:00pm by Victoria*

**Physics?**

In Rutherford's scattering experiments, alpha particles (charge = +2e) were fired at a gold foil. Consider an alpha particle, very far from the gold foil, with an initial kinetic energy of 2.0 MeV heading directly for a gold atom (charge +79e). The alpha particle will come to...
*Friday, July 6, 2012 at 5:45pm by David*

**physics**

In Rutherford's scattering experiments, alpha particles (charge = +2e) were fired at a gold foil. Consider an alpha particle, very far from the gold foil, with an initial kinetic energy of 3.3 MeV heading directly for a gold atom (charge +79e). The alpha particle will come to ...
*Saturday, July 7, 2012 at 1:22pm by mdave*

**physics**

A 5.00 kg particle moving along the x-axis at an initial velocity of 4.5 m/s. what is the initial kinetic energy of the particle?
*Tuesday, December 4, 2012 at 1:02pm by Anonymous*

**physics**

a particle drops from the height 500m with the initial velocity at rest, and it goes into the water. a particle has a mass of 1kg. draw graphs a-t, v-t, and s-t until 10 second after it hits the water. consider the air and water resistance is measured as F air=.005v^2 N and F ...
*Monday, May 2, 2011 at 6:30am by mike*

**physics**

An alpha particle collides with an oxygen nucleus, initially at rest. The alpha particle is scattered at an angle of 60.9° above its initial direction of motion, and the oxygen nucleus recoils at an angle of 51.9° on the opposite side of that initial direction. The final speed...
*Sunday, November 21, 2010 at 9:31pm by siera*

**physics**

An alpha particle collides with an oxygen nucleus, initially at rest. The alpha particle is scattered at an angle of 60.9° above its initial direction of motion, and the oxygen nucleus recoils at an angle of 51.9° on the opposite side of that initial direction. The final speed...
*Sunday, November 21, 2010 at 11:46pm by Please Help!*

**physics**

Consider a particle with initial velocity that has magnitude 12.0 m/s and is directed 60.0 degrees above the negative x axis.
*Wednesday, September 1, 2010 at 8:26pm by tod*

**Physics**

A particle moved along the x axis with a constant acceleration of -85.0 meters per second squared. The initial position of the particle was at the origin and its initial velocity was +325 meters per second. Find the position of the particle at T=4.0 seconds. Please walk ...
*Monday, June 11, 2012 at 2:48pm by Jen*

**Calculus**

The position of a particle moving on a horizontal line is given by s(t)=2t^3-15t^2+24t-5, where s is measured in feet and t in seconds. a: What is the initial position of the particle? b: What is the average velocity of the particle on the interval [0,2]?Indicate units of ...
*Monday, March 4, 2013 at 6:59pm by Raul*

**Science (physics)**

A particle P is launched from a point O with an initial velocity of 60m/s at an angle of 30 degrees to the horizontal. At the same time, a second particle Q is projected in the opposite direction with initial speed of 50m/s from a point level with point O and 100m from O. You ...
*Monday, March 18, 2013 at 9:46pm by Joe*

**physics 201**

A particle has an acceleration of +6.11 m/s2 for 0.281 s. At the end of this time the particle's velocity is +9.06 m/s. What was the particle's initial velocity?
*Wednesday, April 27, 2011 at 2:59pm by desmund*

**physics**

A particle has an acceleration of +6.24 m/s2 for 0.300 s. At the end of this time the particle's velocity is +9.81 m/s. What was the particle's initial velocity?
*Wednesday, October 3, 2012 at 2:10pm by Anonymous*

**dynamics**

The acceleration of a particle is defined by the relation a = -60x^-1.5, where a is expressed in m/s^2 and x in meters. Knowing that the particle starts with no initial velocity at x = 4 m, determine the velocity of the particle when x = 2 m, x = 1 m, x = 100 mm.
*Thursday, September 20, 2012 at 12:55am by Bwelvin*

**physics emergerncyy!**

A particle of mass m1 = 2.5 kg moving along the x axis collides with a particle of mass m2 = 4.7 kg initially at rest. The incoming particle is deflected in the direction 24 degrees above the x axis, whereas the target particle moves off at 14 m/s at 39 degrees below the x ...
*Saturday, November 19, 2011 at 11:23pm by joe*

**physics**

An alpha-particle collides with an oxygen nucleus which is initially at rest. The alpha-particle is scattered at an angle of 67.0 degrees from its initial direction of motion, and the oxygen nucleus recoils at an angle of 52.0 degrees on the other side of this initial ...
*Wednesday, April 24, 2013 at 12:19am by PCm*

**Math**

the acceleration of a particle is defined by the equation a= 4-t^2 with an initial velocity of two millimeters per second. Find the exact equation for the position of the particle if its initial position was zero.
*Friday, July 20, 2012 at 1:52pm by Todd*

**physics**

An alpha-particle collides with an oxygen nucleus which is initially at rest. The alpha-particle is scattered at an angle of 67.0 degrees from its initial direction of motion, and the oxygen nucleus recoils at an angle of 52.0 degrees on the other side of this initial ...
*Wednesday, April 24, 2013 at 12:27am by PHysics*

**physics**

A PARTICLE OF MASS M IS SHOT WITH an initial velocity v making an angle b with the horizontal,the particle moves in the gravitational field of the earth. find the angular momentum of the particle about the origin when the particle is at the origin ,at the highest point of its ...
*Thursday, August 22, 2013 at 7:23pm by mechanics*

**science**

a particle is projected vertically upward with the velocity u m/s and after t(s) another particle is projected upwards from the same point and with the same initial velocity. proof that the particle will meet after a lapes of (u/g + t/2)seconds from the instance of the first ...
*Wednesday, February 13, 2013 at 3:52pm by Fatima*

**Physics2**

A particle of mass 47 g and charge 54 C is released from rest when it is 13 cm from a second particle of charge −15 C. Determine the magnitude of the initial acceleration of the 47 g particle. Answer in units of m/s2
*Sunday, February 12, 2012 at 8:11pm by jc*

**physics**

A particle of mass m and initial velocity v collides elastically with a particle of
*Friday, September 2, 2011 at 9:26am by Nantu*

**electrostatic physics**

A particle of mass 47 g and charge 54 C is released from rest when it is 13 cm from a second particle of charge −15 C. Determine the magnitude of the initial acceleration of the 47 g particle. Answer in units of m/s2
*Sunday, February 12, 2012 at 12:38am by jc*

**College Physics**

Two equally charged particles, held 2.8 x 10-3 m apart, are released from rest. The initial acceleration of the first particle is observed to be 6.8 m/s2 and that of the second to be 6.8 m/s2. If the mass of the first particle is 5.3 x 10-7 kg, what are (a) the mass of the ...
*Friday, July 6, 2012 at 10:35pm by Stephanie6*

**Physics**

A. Consider the motion of a projectile. It is fired at t= 0. Its initial speed is 12 m/s and its initial projection angle is 50◦ from the horizontal. The acceleration of gravity is 9.8 m/s^2. What is the maximum height,h, of its trajectory? Answer in units of m. B. ...
*Wednesday, February 19, 2014 at 8:48pm by Fabricus*

**physics**

a) You need to move a test particle across a floor. Given source that has a charge of q = 3e, What is the displacement between the source and the particle if you need the particle to travel 2.5m in t = 2.5s? Note: the source emits this charge only the INSTANT you pull the ...
*Monday, July 9, 2012 at 11:52pm by Anonymous*

**Physics**

Question: particle J with zero initial mass and X energy accelerates from a static start to 'C' (light speed) in a time frame of N and mass increases 10 to the 28th power per nanosecond- -What is the mass on particle J? -What is the energy of particle J?
*Wednesday, January 16, 2013 at 6:41pm by Dan*

**physics**

A particle leaves the origin with an initial velocity = (2.35 m/s) and moves with constant acceleration = (-1.90 m/s2) + (2.60 m/s2)>. (a) How far does the particle move in the x direction before turning around? m (b) What is the particle's velocity at this time? ( m/s...
*Friday, October 14, 2011 at 8:13pm by Kaylah*

**physics- MC QUESTION!**

Question: A particle is initially traveling to the right when it hits a wall and turns around to the left. The momentum after the collision is less than the initial momentum. a-the impulse on the particle is to the right b-the impulse on the particle is to the left c-there is ...
*Wednesday, May 30, 2012 at 2:26am by katie*

**physics**

A particle of mass 86 g and charge 24 μC is released from rest when it is 67 cm from a second particle of charge −12 μC. Determine the magnitude of the initial ac- celeration of the 86 g particle.
*Thursday, July 8, 2010 at 6:34pm by tt*

**physics **

Two particles moving along parallel paths in the same direction pass the same point at the same time. Particle A has an initial velocity of 8.7 m/s and an acceleration of 1.2 m/s^2 Particle B has an initial velocity of 4.3 m/s and an acceleration of 7.7 m/s^2 At what time will...
*Sunday, November 4, 2012 at 8:46pm by Savannah*

**Physics**

Consider a disk of radius 10 cm and positive surface charge density +3.7 mC/m2. A particle of charge -4.5 mC and mass 75. mg accelerates under the effects of the electric field caused by the disk, from a point at a perpendicular distance from the center of the disk. The final ...
*Sunday, February 14, 2010 at 1:08pm by Sandra*

**PHYSICS**

Consider a disk of radius 10 cm and positive surface charge density +3.7 mC/m2. A particle of charge -4.5 mC and mass 75. mg accelerates under the effects of the electric field caused by the disk, from a point at a perpendicular distance from the center of the disk. The final ...
*Monday, February 22, 2010 at 6:32pm by Alex*

**physics**

The velocity graph of a particle moving along the x-axis is shown. The particle has zero velocity at t=0.00 s and reaches a maximum velocity, vmax, after a total elapsed time, ttotal. If the initial position of the particle is x0=7.28 m, the maximum velocity of the particle is...
*Tuesday, January 25, 2011 at 11:53pm by Markus*

**physics**

A particle leaves the origin with an initial velocity v=(2.40 m/s)x hat and moves with a constant acceleration a=(-1.90 m/s ^2)x hat+(3.20 m/s ^2)y hat. How far does the particle move in the x direction before turning around? Answer is 1.48 m. What is the particle's velocity ...
*Tuesday, September 14, 2010 at 8:46pm by Ka *

**physics**

Two particles A and B are in uniform circular motion about a common center. The acceleration of particle A is 4.7 times that of particle B. Particle B takes 2.4 times as long for a rotation as particle A. Th ratio of the radius of the motion of particle A is that of particle B...
*Friday, September 23, 2011 at 12:14pm by Audrey Petricevich*

**PHYSICS PLEASE HELP ME**

A particle with an initial linear momentum of 3.44 kg · m/s directed along the positive x-axis collides with a second particle, which has an initial linear momentum of 6.88 kg · m/s, directed along the positive y-axis. The final momentum of the first particle is 5.16 kg · m/s...
*Thursday, November 29, 2012 at 10:35pm by Anthony*

**physics**

A particle makes a head-on-collision with an unknown particle at rest.The proton rebounds back with 4/9 of its initial kinetic energy.Find the ratio of mass of unknown particle to mass of proton assuming the collision to be elastic.
*Friday, September 2, 2011 at 9:30am by Nantu*

**Please help with Calculus problem??**

A particle moves with a fixed acceleration 3 m/s^2. If its initial velocity is s(0)=0: a) Find its velocity function. b) How long does it take for the particle to reach the velocity 14 m/s^2? c) Find the distance the particle traveled when its velocity reaches 14 m/s^2.
*Wednesday, July 10, 2013 at 9:39am by Robin*

**physics**

a juggler throws a ball with an initial horizontal velocity of +1.1 m/s and an initial vertical velocity of +5.7 m/s. What is its acceleration at the top of its flight path? make sure to consider the sign when responding. consider the upward direction as positive.
*Friday, June 24, 2011 at 5:43pm by aimee*

**Physics**

Given the initial position of a particle is x(0)=2m at t(0)=0s. At t=2s, what are the particle's (a) position, (b) velocity and (c)acceleration?
*Tuesday, August 26, 2008 at 10:35am by Robert*

**calculus**

a particle moves along the x-axis (units in cm) its initial position at t=0 sec is x(0)=15. the figure shows the graph of the particle's velocity v(t). the numbers are areas of the enclosed regions. in the graph 0 to a is 4 under the x-axis, a to b is 5 above the x-axis, b to ...
*Wednesday, April 28, 2010 at 5:49pm by shelby*

**physics**

Two particles are fixed on an x axis. Particle 1 of charge 47.9 μC is located at x = -5.87 cm; particle 2 of charge Q is located at x = 32.3 cm. Particle 3 of charge magnitude 52.8 μC is released from rest on the y axis at y = 15.1 cm. What is the value of Q if the ...
*Thursday, December 13, 2012 at 10:47am by Anonymous*

**Math**

A particle A of mass 2.11 kg collides with another particle B of mass 3.86 kg. Their initial velocities are u1 = 2.16i + 0.88j and u2 = 0.7i + 1.12j just before impact. After collision, they both merged and becomes a composite particle, which travel with a velocity of V. ...
*Monday, September 3, 2012 at 11:26am by Darren*

**Ap Calculus**

Please help. A particle moves in a stright line and its acceleration is given by a(t)=6t+4. its initial position is s(0)=9 and its position when t=1 is s(1)=6. find the velocity of the particle when t=2. A. v(2)=14 B. v(2)=7 C. v(2)=4 D. v(2)=9 E. v(2)=0
*Sunday, January 27, 2013 at 2:32pm by Anonymous*

**Physics**

A pendulum consist of a particle P of mass m, attached to one end of a model string of length l=2.85m. The other end of the string is attached to a fixed point O and the particle moves in a vertical circle about the fixed point. The angle made by the string with the vertical ...
*Friday, April 27, 2012 at 10:45am by Anonymous*

**Physics**

A particle leaves the origin with an initial velocity v=(3.68i) m/s and a constant acceleration a=(-3.33i-3.72j)m/s^2. When the particle reaches its maximum x coordinate, what are (a) its velocity, (b) its position vector?
*Friday, March 14, 2014 at 3:45pm by Stacey*

**physics**

In the figure, particle A moves along the line y = 29 m with a constant velocity of magnitude 3.5 m/s and parallel to the x axis. At the instant particle A passes the y axis, particle B leaves the origin with zero initial speed and constant acceleration of magnitude 0.44 m/s2...
*Sunday, September 12, 2010 at 11:40pm by Anonymous*

**Physics**

In the figure, particle A moves along the line y = 26 m with a constant velocity of magnitude 2.6 m/s and parallel to the x axis. At the instant particle A passes the y axis, particle B leaves the origin with zero initial speed and constant acceleration of magnitude 0.31 m/s2...
*Tuesday, September 21, 2010 at 12:58pm by Anonymous*

**Physics**

A particle leaves the origin with an initial velocity = (6.91 ) m/s and a constant acceleration = ( - 2.38 - 2.79 ) m/s2. When the particle reaches its maximum x coordinate, what are (a) its velocity, (b) its position vector?
*Monday, September 13, 2010 at 9:29pm by Antonio*

**Physics**

A particle starts from the origin at t = 0 with an initial velocity of 8.0 m/s along the positive x axis. If the acceleration is (-3.7 + 2.5 ) m/s2, determine the velocity and position of the particle at the moment it reaches its maximum x coordinate.
*Wednesday, August 29, 2012 at 5:47pm by Leena*

**physics**

A particle starts from the origin at t = 0 with an initial velocity of 5.4m/s along the positive x axis.If the acceleration is (-3.4 i + 4.9 j )m/s^2, determine (a)the velocity and (b)position of the particle at the moment it reaches its maximum x coordinate.
*Thursday, February 7, 2013 at 9:33pm by Anonymous*

**Physics**

A particle with a charge of -4.50x 10^-10 C and a mass of 6.6x 10^-18 kg is placed between two oppositely charged parallel plates with a voltage of 9.00x 10^5 V. The particle is injected at the negative plate with an initial speed of zero. What is the final speed of the ...
*Thursday, April 5, 2012 at 1:37pm by Marie*

**physics**

An alpha-particle collides with an oxygen nucleus which is initially at rest. The alpha-particle is scattered at an angle of 67.0 degrees from its initial direction of motion, and the oxygen nucleus recoils at an angle of 52.0 degrees on the other side of this initial ...
*Wednesday, April 24, 2013 at 12:27am by PHysics*

**Dynamics**

The acceleration of a particle moving along a straight line is inversely proportional to its speed with the constant of porpotionality being k. The body starts from the position s = x0 ^i with initial speed v0. Determine the velocity of the particle as a function of time t. ...
*Tuesday, January 22, 2013 at 8:08am by Devin*

**physics**

A particle starts from the origin at t = 0 with an initial velocity of 5.5 m/s along the positive x axis.If the acceleration is (-2.8i + 4.1jm/s^2, determine (a)the velocity and (b)position of the particle at the moment it reaches its maximum x coordinate.
*Sunday, October 16, 2011 at 3:26am by julia*

**physics**

A 0.150 kg particle moves along an x axis according to x(t) = -13.00 + 2.00t + 3.50t2 - 2.50t3, with x in meters and t in seconds. In unit-vector notation, what is the net force acting on the particle at t = 3.45 s? I tried solving using s=Vit + (.5)at^2 but I can't find the ...
*Tuesday, September 22, 2009 at 12:29am by jeff*

**Physics**

A 0.150 kg particle moves along an x axis according to x(t) = -13.00 + 2.00t + 3.50t2 - 2.50t3, with x in meters and t in seconds. In unit-vector notation, what is the net force acting on the particle at t = 3.45 s? I tried solving using s=Vit + (.5)at^2 but I can't find the ...
*Tuesday, September 22, 2009 at 1:55am by richard*

**physics help!**

The equation of motion of a particle in vertical SHM is given by y = (17 cm) sin 0.70t. (a) What is the particle's displacement at t = 1.1 s? (b) What is the particle's velocity at t = 1.1 s?(c) What is the particle's acceleration at t = 1.1 s?
*Wednesday, April 13, 2011 at 4:43pm by anonymous*

**physics**

The equation of motion of a particle in vertical SHM is given by y = (10 cm) sin 0.80t. (a) What is the particle's displacement at t = 1.1 s? (b) What is the particle's velocity at t = 1.1 s? (c) What is the particle's acceleration at t = 1.1 s?
*Saturday, April 28, 2012 at 9:41pm by Darla*

**physics**

I shall assume that the alpha particle, which has a charge of 2e, cannot move. The proton will stop and turn around when all if its initial kinetic energy, (1/2) mp V^2, is converted to electrostatic potential energy. The electrostatic potential energy when they are a distance...
*Monday, September 29, 2008 at 1:15am by drwls*

**Physics**

A particle with an initial linear momentum of 2.28 kg · m/s directed along the positive x-axis collides with a second particle, which has an initial linear momentum of 4.56 kg · m/s, directed along the positive y-axis. The final momentum of the first particle is 3.42 kg · m/s...
*Friday, October 21, 2011 at 8:37pm by Kellie*

**Physics**

I'm going to make the assumption that this is in vector unit notation and that this is a two dimensional problem. If particle P is moving 2.0m/s(i) + 4m/s(j) with respect to particle A then particle A should appear to be moving -2.0m/s(i) - 4.0m/s(j). This can be imagined by ...
*Saturday, October 6, 2012 at 3:20pm by Andrew Blakely*

**physics**

Two particles with masses m and 3m are moving toward each other along the x axis with the same initial speeds Vi. Particle m is traveling to the left, and the particle 3m is traveling to the right. They undergo an elastic glancing collision such that particles m is moving in ...
*Sunday, May 20, 2012 at 7:50am by ace*

**Physics**

A particle starts from the origin at t = 0 and moves along the positive x axis. A graph of the velocity of the particle as a function of the time is shown in the figure; the v-axis scale is set by vs = 7.0 m/s. (a) What is the coordinate of the particle at t = 5.0 s? (b) What ...
*Wednesday, February 5, 2014 at 2:09pm by Robin*

**math**

A particle is traveling along a one-dimensional path (such as a number line). The position of the particle is governed by the time function x(t) ƒ 3t 4 ƒ{16t3 ƒy18t 2 ƒy 2 , where t is in minutes and 0 „T t „T 5 . Answer the following questions. a) At what times is the ...
*Saturday, March 12, 2011 at 12:52am by feysal*

**Physics**

A uniform thin ring of charge, with radius 5.20 cm and total charge 6.60 ìC, is located in the yz-plane and centered on the origin. (In other words, the x-axis passes through the center of the ring, and is perpendicular to the ring.) A particle of mass 17.9 g and charge 4.80 ì...
*Monday, November 1, 2010 at 2:04pm by Rudi*

**Physics**

A particle initially located at the origin has an acceleration of a= 5.00J^ m/s^2 and an initial velocity of v0= 8.00I^ m/s A) Find the vector position at any time t where t is measured in seconds. Find the vector velocity at any time t. b) Find the coordinates of the particle...
*Monday, July 6, 2009 at 6:55pm by Marie*

**math**

For 4.95 seconds , a particle moves in a straight line according to the position function: s(t) = e^t(5-t)-5 . a. when id the particle at rest ? when is particle moving forward ? b. Find the total distance traveled by the particle in intervals [0,1] seconds and [1,2] seconds...
*Thursday, November 7, 2013 at 3:04am by Anonymous*

**math**

For 4.95 seconds , a particle moves in a straight line according to the position function: s(t) = e^t(5-t)-5 . a. when id the particle at rest ? when is particle moving forward ? b. Find the total distance traveled by the particle in intervals [0,1] seconds and [1,2] seconds...
*Thursday, November 7, 2013 at 3:04am by Anonymous*

**science**

the velocity of a particle is given by v=[16t^2i+4t^3j +(5t+2)k]m/s, where t is in seconds. If the particle is at the origin when t=0, determine the magnitude of the particle's acceleration when t=2s. What is the x,y,z coordinate position of the particle at this instant.
*Monday, November 3, 2008 at 12:22am by sarah*

**Physics**

A particle of mass m is shot with an initial velocity vector v i and makes an angle θ with the horizontal, as shown below. The particle moves in the gravitational field of the Earth. (makes a shape of a parabola)Find the angular momentum of the particle about the origin ...
*Thursday, March 4, 2010 at 9:56pm by emath*

**Physics**

A particle with mass m = 1.20g and charge q = 345ìC is traveling in the x-direction with an initial velocity of v0 = 68.0m/s. The particle passes through a constant electric field in the y-direction with magnitude |E| = 263N/C over a distance of d = 12.0m. (a) What is the ...
*Thursday, January 17, 2013 at 5:45pm by Nick*

**PHYSICS**

Particles 1 and 2, each of mass m, are attached to the ends of a rigid massless rod of length L1 + L2, with L1 = 19 cm and L2 = 75 cm. The rod is held horizontally on the fulcrum and then released. What is the magnitude of the initial acceleration of particle 1? What is the ...
*Saturday, March 24, 2007 at 2:51pm by Calvin*

**PHYSICS**

Particles 1 and 2, each of mass m, are attached to the ends of a rigid massless rod of length L1 + L2, with L1 = 19 cm and L2 = 75 cm. The rod is held horizontally on the fulcrum and then released. What is the magnitude of the initial acceleration of particle 1? What is the ...
*Saturday, March 24, 2007 at 6:35pm by Calvin*

**Please help me with M1 kinematics! **

A particle is travelling with velocity (4i+5j)m/s. It undergoes an acceleration of magnitude 2.5m/s^2 in a direction given by the vector (3i-4j). Find the velocity and displacement of the particle from its initial position after 4s.
*Sunday, February 26, 2012 at 5:41am by Jat*

**physics**

The particle has initial KE, lets say K. That energy can be converted to PE as it approaches the nucleus. When equal, the particle can go no further. K= INTEGRAL F*dr= -kq1q2/r evaluated from infinity to x K= kq1q2/x so the minimum distance x= kq1q2/K So look up the energy ...
*Friday, January 14, 2011 at 11:20am by bobpursley*

**PHYSICS**

An alpha particle (which has two protons) is sent directly toward a target nucleus containing 80 protons. The alpha particle has an initial kinetic energy of 0.79 pJ. What is the least center-to-center distance the alpha particle will be from the target nucleus, assuming the ...
*Thursday, April 10, 2008 at 1:35am by Todd*

**physics**

Two point charges of 48 nC and -45 nC are held fixed on an x axis, at the origin and at x = 77 cm, respectively. A particle with a charge of 69 μC is released from rest at x = 49 cm. If the initial acceleration of the particle has a magnitude of 123 km/s2, what is the ...
*Friday, January 14, 2011 at 7:15pm by Anonymous*

**calculus**

5. A particle moves along the y – axis with velocity given by v(t)=tsine(t^2) for t>=0 . a. In which direction (up or down) is the particle moving at time t = 1.5? Why? b. Find the acceleration of the particle at time t= 1.5. Is the velocity of the particle increasing at t...
*Sunday, February 26, 2012 at 2:45am by Taeyeon*

**Physics**

A solid uniform sphere has a mass of 2.0 104 kg and a radius of 1.5 m. What is the magnitude of the gravitational force due to the sphere on a particle of mass m = 0.2 kg located at a distance of 1.6 m from the center of the sphere? What if it is 1.1 m from the center of the ...
*Tuesday, February 13, 2007 at 10:17pm by winterWX*

**physics**

The position vector r of a particle moving in the xy plane is r=2ti+2sin[(pi/4)t]j , with is in meters and t in seconds. (a) Calculate the x and y components of the particle's position at , and 4.0 s and sketch the particle's path in the plane for the interval . (b) Calculate ...
*Sunday, March 10, 2013 at 3:34pm by Anonymous*

**Physics **

A smooth circular hoop with a radius of 0.400 m is placed flat on the floor. A 0.450-kg particle slides around the inside edge of the hoop. The particle is given an initial speed of 8.50 m/s. After one revolution, its speed has dropped to 4.00 m/s because of friction with the ...
*Thursday, March 8, 2012 at 12:19pm by Anonymous*

**physics**

three point particles are fixed in place in an xy plane. Particle A has mass mA = 3 g, particle B has mass 2.00mA, and particle C has mass 3.00mA. A fourth particle D, with mass 4.00mA, is to be placed near the other three particles. What (a) x coordinate and (b) y coordinate ...
*Sunday, January 2, 2011 at 5:38pm by Anonymous*

**Physics **

particle A moves along the line y = 30m with a constant velocity of magnitude 3.5 m/s and parallel to the x axis. At the instant particle A passes the y axis, particle B leaves the origin with 0 initial speed and constant acceleration of magnitude 0.50 m/s2. What angle θ ...
*Sunday, September 30, 2012 at 7:39pm by James*

**Calculous**

A particle moves along the c-axis so that at time t its position is given by x(t)=t^2-6^t+9t+11 a)What is the velocity of the particle at t=0 b)During what time intervals is the particle moving to the left? c)What is the total distance traveled by the particle t=0 to t=2
*Sunday, November 20, 2011 at 2:37pm by Yoona*

**Physics**

A particle is projected vertically upwards from ground level with an initial velocity of 34.94m/s. Neglecting air resistance, calculate the total time taken, in seconds, for the particle to hit the ground again. Take the magnitude of the acceleration due to gravity to by 9.81m...
*Tuesday, March 6, 2012 at 3:25am by Annoymous*

**Calculus-particle motion**

1. A particle is moving on the x-axis (or any number line) Its position x(t), or distance from the origin, at the time t is given by x(t)=4t^3-16t^2+15t. t is greater than or equal to 0 a.) Where is the particle when it is at rest? b.) During what time interval is the particle...
*Monday, February 7, 2011 at 6:28pm by Matt*

**physics**

which of collowing situations describe a particle that might have a non-zero velocity? canbe more than one A) a particle that has a constant position as a function of time B) a particle that has its position changing as a fnction of time c)when you graph the particle's ...
*Tuesday, April 10, 2012 at 5:33pm by kelly*

**physcis ! HELP !!!! **

which of collowing situations describe a particle that might have a non-zero velocity? canbe more than one A) a particle that has a constant position as a function of time B) a particle that has its position changing as a fnction of time c)when you graph the particle's ...
*Tuesday, April 10, 2012 at 6:00pm by kelly*

**Physics**

A charged particle moves into a region of uniform magnetic field B, goes through half a circle, and then exits that region. The particle is either a proton or an electron (you must decide which). It spends 155 ns in the region. a) What is the magnitude of B? b)If the particle ...
*Wednesday, November 17, 2010 at 11:04pm by LA*

**physics**

A particle of mass m and initial velocity v collides elastically with a particle of mass M coming from opposite direction.After collision m has velocity V/2 at right angles to incident direction and M moves at an angle of 45 degree . Find M/m.
*Friday, September 2, 2011 at 9:26am by Nantu*

**PARTICLE PHYSICS**

particle A has a mass of 2 and a charge of -1. particle B has a mass of 2 and a charge of +1. are particle A and particle B necessarily antiparticles? explain your answer
*Wednesday, June 9, 2010 at 5:52pm by Nick*

**Engineering Kinematic**

The particle travels along the path defined by the parabola y=0.5(x^2). If the component of velocity along the x-axis is v=5t [m/s], determine the particle's distance from the origin and the magnitude of its acceleration when t=1s. The initial condition is t=0, x=0 and y=0. ...
*Saturday, October 16, 2010 at 4:49am by Claire*

**physics**

Particle A of mass 'm' has initial velocity v.After colliding with a particle B of mass'2m' the particles have the following paths B makes an angle 45 degree while A makes an angle X.first,A was moving straight.Find X.
*Friday, September 2, 2011 at 9:41am by Nantu*

**PHYSICS**

The only force acting on a particle is conservative force F. If the particle is at point A, the potential energy of the system associated with F and the particle is 39 J. If the particle moves from point A to point B, the work done on the particle by F is +25 J. What is the ...
*Wednesday, April 17, 2013 at 7:29pm by Sara*

**Physics**

A particle with mass 6.4 is acted on by a conservative force moves along a path given by: x=5.2*cos(2.2t) y=5.9*sin(2.2t) Find the potential energy of the particle at t = 1, x = 8.0, and y = 14.7 while assuming that the initial potential energy equals zero.
*Friday, March 21, 2008 at 11:58am by Chuck*

**Physics**

A particle with mass 6.4 is acted on by a conservative force moves along a path given by: x=5.2*cos(2.2t) y=5.9*sin(2.2t) Find the potential energy of the particle at t = 1, x = 8.0, and y = 14.7 while assuming that the initial potential energy equals zero.
*Friday, March 21, 2008 at 8:22pm by Chuck*

**physics**

A particle is projected vertically upwards with velocity of u.after t seconds particle is projected from some point with same velocity.How long does it take for the second particle to meet the first particle?
*Monday, April 22, 2013 at 8:39am by Anonymous*

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