Friday

August 29, 2014

August 29, 2014

Number of results: 45,313

**Physics**

An artillery shell is fired with an initial velocity of 300m/s at 55.0 degrees above the horizontal. To clear an avalanche, it explodes on a mountainside 42.0s later. What are the x and y coordinates of the shell where it explodes, relative to its firing point? a) (1.68km, 7....
*October 9, 2012 by Lindsay*

**physics**

An alpha particle, the nucleus of a helium atom, is at rest at the origin of a Cartesian coordinate system. A proton is moving with a velocity of v towards the alpha particle from the positive x axis direction. If the proton is initially far enough away to have no potential ...
*September 29, 2008 by alexis*

**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 ...
*March 8, 2012 by Anonymous*

**Math**

The horizontal range, R, is modeled by this formula: R(x)=(v^2*sin2(x))/32 The initial velocity (v) is 90ft per second. The ball is pitched at an angle of x degrees with the horizontal. When x=26 degrees, the ball travels 200ft. At what other value of x will the ball travel ...
*June 16, 2012 by Amber*

**physics please help**

A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 11.0 m/s when the hand is 1.50 m above the ground. How long is the ball in the air before it hits the ground? (The student moves her hand out of the way.) v(final)=v(...
*October 10, 2007 by Anonymous*

**physics**

A baseball player slams a fastball towards left field. The ball is hit 1.00 m above the plate at an initial velocity of 3.0 m/s at a 30 degree angle above the horizontal. The left field wall is 113 m away and is 3.00 m high. Is this a home run shot or not?.
*September 26, 2013 by Ashley*

**physics**

A baseball player slams a fastball towards left field. The ball is hit 1.00 m above the plate at an initial velocity of 36.0 m/s at a 30 degree angle above the horizontal. The left field wall is 113 m away and is 3.00 m high. Is this a home run shot or not?.
*September 26, 2013 by Ashley*

**Physics**

A 15-g bullet is fired horizontally into a 3.000-kg block of wood suspended by a long cord. The bullet sticks in the block. Compute the speed of the bullet if the impact causes the block to swing 10 cm above its initial level. Initial Velocity of bullet=19.1m/s
*July 19, 2010 by Lony*

**College Physics**

A charged particle is hanging from the side of a wall by means of an uncharged string. The wall has a negative charge producing a horizontal electric field. The particle has a mass of .01 Kg. and charge of -80(micro)C and is suspended by a string .3m long. The electric force ...
*October 11, 2011 by Adam*

**physics**

A 2.00 kg block, on a horizontal surface with coefficient of static friction 0.900, is pushed by a force that is directed down at an angle of 30.0 degrees to the horizontal. Find the minimum magnitude of the force needed to get the block to start moving. so I found my N force ...
*November 19, 2010 by Trace*

**Oceanography**

On a sunny day in an estuary, the surface irradiance is 1.6*10^17 photons cm^-2 s^-1. What is k if the irradiance is 7.3*10^13 photons cm^-1 s^-1 at 16 m depth? At a spot in the ocean, the surface irradiance is 7.8*10^16 photons and k=.14 m^-1. At what depth does the euphotic ...
*March 5, 2010 by Krysten*

**physics**

A ball is thrown with an initial velocity of 20 meters per second at an angle of 60° with the horizontal ground surface. Find the following: a. the horizontal velocity of the ball b. the balls initial vertical velocity c. the range of the ball d. the maximum height of the ball
*December 15, 2011 by Anonymous*

**PHYSICS**

A baseball is thrown with an initial velocity of magnitude v at an angle of 21.8 with respect to the horizontal (x) direction. At the same time, a second ball is thrown with the same initial speed at a different angle A with respect to x. If the two balls land at the same spot...
*February 4, 2011 by Renee*

**Physics**

A boy stands on the edge of a building 7 meters high and throws a rock at 60-degree angle. The release point from his hand is 1.6 meters above his feet(so the release point above the ground is 8.6 meters.) The rock lands on the ground 15 meters away from the building at a ...
*November 21, 2008 by Anonymous*

**Physics**

A shell is launched at 140 m/s 56.0 degrees above the horizontal. When it has reached its highest point, it launches a projectile at a velocity of 110 m/s 35.0 degrees above the horizontal relative to the shell. 1) Find the maximum height (in m) about the ground that the ...
*September 18, 2010 by .*

**Physics**

If a particle moves with velocity V PA = (2.0 m/s) + (4.0 m/s) relative to frame A, what is the velocity V AP of the frame relative to the particle? a. -(2.0 m/s) + (4.0 m/s) b. -(2.0 m/s) - (4.0 m/s) c. (2.0 m/s) + (4.0 m/s)
*October 6, 2012 by Sharon*

**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 ...
*January 2, 2011 by Anonymous*

**Science**

1. Acceleration involves a change in ____. (1 point) speed velocity displacement direction 2. Which of the following statements about acceleration is true? (1 point) Like velocity, acceleration has a direction. Your acceleration is positive when you speed up. Your acceleration...
*March 12, 2013 by Anonymous*

**Physics**

A particle, starting from point A in the drawing at a height h0 = 2.3 m, is projected down the curved runway. Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height hf = 4.6 m above the floor before falling back down. Ignoring ...
*November 2, 2008 by Brandon*

**physics**

A particle, starting from point A in the drawing at a height h0 = 3.1 m, is projected down the curved runway. Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height hf = 4.5 m above the floor before falling back down. Ignoring ...
*September 26, 2011 by Anonymous*

**physics**

A particle, starting from point A in the drawing at a height h0 = 3.2 m, is projected down the curved runway. Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height hf = 4.1 m above the floor before falling back down. Ignoring ...
*December 8, 2011 by joe*

**physics**

A particle, starting from point A in the drawing at a height h0 = 3.2 m, is projected down the curved runway. Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height hf = 4.1 m above the floor before falling back down. Ignoring ...
*December 8, 2011 by Anonymous*

**Dynamics**

The acceleration of a perticle as it moves along a straight line is geven by a=(2t-1) m/s2. If x=1m and v=2m/s when t=0s, determine the particle's velocity and position when t=6s. Also, determine the total distance the particle travels during this time period.
*July 12, 2014 by Dynamics Problems*

**physics**

The acceleration of a certain particle is a function of time: a(t) = pt^2-qt^3, where p and q are constants. Initially, the velocity and position of the particle are zero. (a) What is the velocity as a function of time? (b) What is the position as a function of time?
*August 23, 2012 by mitch*

**Physics**

From the window of a building, a ball is tossed from a height y0 above the ground with an initial velocity of 9.40 m/s and angle of 23.0° below the horizontal. It strikes the ground 6.00 s later. Initial velocity components: vx = 8.65 m/s vy = -3.67 m/s (c) Find the equations ...
*September 15, 2013 by <3*

**Physics**

Initially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic? (Note, there are ...
*March 27, 2011 by Mary*

**Physics**

Initially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic? (Note, there are ...
*March 27, 2011 by Mary*

**physics**

A ball is thrown upward from a platform 5.1 meters high with a speed of 13 m/s at an angle 45 degrees from the horizontal. what is the magnitude of its velocity when it hits the ground?
*September 11, 2009 by Andy *

**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.
*March 21, 2008 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.
*March 21, 2008 by Chuck*

**physics**

A 301-kg boat is sailing 16.5° north of east at a speed of 2.08 m/s. Thirty seconds later, it is sailing 37.2° north of east at a speed of 3.60 m/s. During this time, three forces act on the boat: a 32.7-N force directed 16.5° north of east (due to an auxiliary engine), a 21.7...
*October 3, 2012 by Anonymous*

**Physics**

A 301-kg boat is sailing 16.5° north of east at a speed of 2.08 m/s. Thirty seconds later, it is sailing 37.2° north of east at a speed of 3.60 m/s. During this time, three forces act on the boat: a 32.7-N force directed 16.5° north of east (due to an auxiliary engine), a 21.7...
*October 9, 2012 by Anonymous*

**calculus**

Consider a gun fired from a tower 96ft above the ground. The angle of elevation of the gun is 60 degrees, and its muzzle velocity is 1600 ft/sec (also gravity in this equation is 32 ft/sec^2). a)When does the bullet hit the ground? b)Write a parametric equation that models the...
*August 13, 2011 by jessica*

**physics**

a shooter putter releases the shot some distance above the level ground with a velocity of 12.0 m s 51.0 degrees above the horizontal the shot hits the ground 2.08 s later what is the x-component of the shots acceleration while in flight?
*February 4, 2008 by tiara*

**physics**

A planet orbits a star once every 3.14x10^7 s in a nearly circular orbit of radius 1.51x10^11 m. (a) With respect to the star, determine the angular speed of the planet b) With respect to the star, determine the tangential speed of the planet. c) With respect to the star, ...
*May 25, 2012 by Jennifer*

**physics**

A golf ball is hit with an initial velocity of 50 m/s at an angle of 45 degrees with the horizontal. How far will it travel horizontally before it hits the ground?
*January 26, 2008 by Michael*

**physics**

A missile is launched at an angle of 25 degrees to the ground. It hits a target at 301.5 meters from the point of launch. find the initial velocity
*February 22, 2014 by help*

**physics**

A neutron, a proton, and an electron are initially at the same distance from a relatively large stationary nucleus moving at a constant velocity. Assume the masses of the proton and neutron are equal. 1. Which is the first particle to reach the nucleus? 2. Which particle ...
*March 23, 2008 by Karen*

**PHYSICS!!!**

A neutron, a proton, and an electron are initially at the same distance from a relatively large stationary nucleus moving at a constant velocity. Assume the masses of the proton and neutron are equal. 1. Which is the first particle to reach the nucleus? 2. Which particle ...
*March 23, 2008 by Karen*

**Physics**

Maria throws an apple vertically upward from a height of 1.3m unit an initial velocity of velocity of 12.4m/s 1. will the apple reach a friend in a tree house 5.3m above the ground. 2. If the apple is not caught, how long will the apple be in the air before it hits the ground.
*February 6, 2013 by Jessica*

**Physics - KE/rotation**

In Figure 11-32 (which shows a ball at the top of an incline, at the bottom of the incline a loop begins with radius R and Q a point on the loop lined up with the center of the loop), a solid brass ball of mass m and radius r will roll without slipping along the loop-the-loop ...
*March 25, 2007 by COFFEE*

**physics**

A particle leaves its initial position x0 at time t=0 moving in the positive x direction with speed v0 but undergoing acceleration of magnitude (a) in the negative x direction. Find expressions for a) the time when it returns to the position x0 and b) its speed when it passes ...
*January 30, 2012 by princessw*

**Physics**

Two objects collide and bounce off one another. After the collision, object m1 = 1.67 kg moves off at 14.5 m/s at a heading of 327 degrees. Object m2 = 1.66 kg moves off at 8.9 m/s at a heading of 211 degrees. Initially, m2 was traveling at 11.8 m/s at a heading of 318 degrees...
*January 16, 2011 by Joan*

**Physics**

An isolated segment of wire of length L=4.50 m carries a current of magnitude i=35.0 A at an angle theta=50.3 degrees with respect to a constant magnetic field with magnitude B= 6.70E-2 T. What is the magnitude of the magnetic force on the wire? a) 2.66 N b) 3.86 c) 5.60 N d) ...
*October 24, 2011 by Jessica*

**Physics**

A vector "A" i s20 units long at an angle of 15 degrees above the horizontal(x-axis) and a vector "B" is 40 units long at an angle of 60 degrees above the horizontal(x-axis). What is the magnitude and direction of the resultant vector?
*September 23, 2009 by BMAN*

**maths(urgent....please...)**

1) A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance. i have posted the same question earlier and i got some ...
*April 12, 2011 by arun*

**physics**

A basketball is shot from 2 meters up at an angle of 60° above the x axis at an initial velocity of 9 m/s.What is the maximum height the ball will reach?
*May 31, 2010 by neil*

**8th physics**

A golf ball is hit with an initial velocity of 50 m/s at an angle of 45° above the horizontal. What's the maximum height it will reach?
*May 31, 2010 by john*

**Physics**

A force of 50 N directed 30 degrees above the hoizontal is applied to a 10-kg block at rest on a rough horizontal surface. What is the coefficient of kinetic friction between the block and the horizontal surface if the acceleration of the block is 2.0 m/s2?
*November 22, 2010 by Heather*

**Physics**

A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.80 s, it is at point (4.40 m, 6.20 m) with velocity (3.70 m/s) and acceleration in the positive x direction. At time t2 = 11.0 s, it has velocity (3.70 m/s) and ...
*October 3, 2011 by Nelson*

**PHYSICS1**

A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.90 s, it is at point (5.30 m, 5.30 m) with velocity (2.20 m/s) and acceleration in the positive x direction. At time t2 = 14.0 s, it has velocity (2.20 m/s) and ...
*February 5, 2013 by Bader*

**physics**

A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.60 s, it is at point (4.30 m, 6.20 m) with velocity (3.30 m/s) and acceleration in the positive x direction. At time t2 = 13.0 s, it has velocity (3.30 m/s) and ...
*February 8, 2013 by hi*

**Physics**

I solved 1 out of 2 correctly: A shell is launched at 140 m/s 56.0 degrees above the horizontal. When it has reached its highest point, it launches a projectile at a velocity of 110 m/s 35.0 degrees above the horizontal relative to the shell. 1) Find the maximum height (in m) ...
*September 19, 2010 by .*

**Physics**

1) A particle travels between two parallel vertical walls separated by 16 m. It moves toward the opposing wall at a constant rate of 6.4 m/s. It hits the opposite wall at the same height. The acceleration of gravity is 9.8 m/s. a) What will be its speed when it hits the ...
*June 16, 2011 by Lia*

**physics**

A rifle allowed a bullet fired with an initial horizontal velocity to travel 76.0 m while only falling a distance of 0.40 m. What was the initial x-velocity of the bullet? Round your answer to 2 decimal places.
*November 11, 2012 by Sara*

**Math**

A particle is projected along an inclined plane with a velocity given by the formula v = 4.4t2 + 10.1t -23.2. Determine the acceleration of the particle when t = 1.5 s. acceleration in m/s2 = My Answer V'=8.8t+10.1 V"=8.8 V"(1.5)= 8.8 acceleration in m/s2 = 8.8 Can you please ...
*January 29, 2013 by Brownie*

**math**

(a)find antiderivatives for the following functions : (i) e^5x sinh3x + 4x+6/x^2+3x+5 . (ii)root3x(x^2-2/x+1). (b)Evaluate the following integrals over the given intervals: (i)4/2x-1 - 3/x+4 over [1,3] (ii)cosh 3x-sinh4x over [0, ln2] (c)A particle is moving from rest with an...
*May 8, 2012 by weloo_volley*

**physics**

A particle is released on the smooth inside wall of a cylindrical tank at A with a velocity v which makes an angle beta with the horizontal tangent. When the particle reaches a point B a distance h below A, determine the expression for the angle theta made by its velocity with...
*November 7, 2009 by Jessi*

**Maths**

When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -10t^2 + v*t + k gives the height of the ball at any time, t in seconds, where v is the initial velocity (speed) in meters/sec and k is the initial height in meters (as if you were on ...
*February 19, 2010 by Anonymous*

**physics**

Two force vectors F1 = (2.5 N) x - (3.0 N) y and F2 = - (6.0 N) x + (4.8 N) y are applied to a particle. What third force F3 would make the net, or resultant, force on the particle zero? Magnitude ___ N Direction ___° (from the +x axis)
*October 26, 2010 by rachel*

**physics**

Two force vectors F1 = (2.5 N) x - (3.0 N) y and F2 = - (6.0 N) x + (4.8 N) y are applied to a particle. What third force F3 would make the net, or resultant, force on the particle zero? Magnitude ___ N Direction ___° (from the +x axis)
*October 26, 2010 by rachel*

**physics**

At a time t after being projected from the ground, a projectile is displaced x units horizontally and y units vertically above its point of projection. (Use any variable or symbol stated above along with the following as necessary: g.) (a) What are the horizontal and vertical ...
*February 6, 2012 by joe*

**physics**

One particle has a mass of 3.00*10-3 kg and a charge of +7.60 µC. A second particle has a mass of 6.00*10-3 kg and the same charge. The two particles are initially held in place and then released. The particles fly apart, and when the separation between them is 0.100 m, ...
*February 3, 2007 by Ann*

**Physics**

A particle travels counterclockwise around the origin at constant speed in a circular path that has a diameter of 2.50 m, going around twice per second. Point Q is on the path halfway between points P and R, which lie on the x axis and the y axis, respectively. State the ...
*May 25, 2012 by Rachel*

**physics**

From the edge of the rooftop of a building, a boy throws a stone at an angle 26.1° above the horizontal. The stone hits the ground 4.25 s later, 103m away from the base of the building (b) Find the initial velocity of the stone. (c) Find the initial height h from which the ...
*September 28, 2013 by mia*

**math**

Snell's law of refraction can be written as sin i = n sin r, where n is the refractive index from air to water, i is the angle of incidence, and r is the angle of refraction. In an experiment where a ray of light is directed from air into water, if the angle of incidence is 46...
*May 14, 2007 by claudia*

**Physics**

A rock is thrown straight upward with an initial velocity of 9.6 m/s in a location where the acceleration due to gravity ahs a magnitude of 9.81 m/s^2. To what height does it rise? please walk me through this problem:)
*February 7, 2009 by y912f*

**physics**

A rock is thrown straight upward with an initial velocity of 9.6 m/s in a location where the acceleration due to gravity has a magnitude of 9.81 m/s^2. To what height does it rise? i got 4.7 can you please show me how to solve for this last one
*February 17, 2009 by y912f*

**physics**

In Figure 20.2 is a velocity selector that can be used to measure the speed of a charged particle. A beam of particles is directed along the axis of the instrument. A parallel plate capacitor sets up an electric field E which is oriented perpendicular to a uniform magnetic ...
*April 23, 2014 by Anonymous*

**math**

heeeeelp meeeee ... (a)find antiderivatives for the following functions : (i) e^5x sinh3x + 4x+6/x^2+3x+5 . (ii) γ3x(x^2-2/x+1). (b)Evaluate the following integrals over the given intervals: (i)4/2x-1 - 3/x+4 over [1,3] (ii)cosh 3x-sinh4x over [0, ln2] (c)A particle is moving...
*April 25, 2012 by weloo_volley*

**math**

weloo (a)find antiderivatives for the following functions : (i) e^5x sinh3x + 4x+6/x^2+3x+5 . (ii)root3x(x^2-2/x+1). (b)Evaluate the following integrals over the given intervals: (i)4/2x-1 - 3/x+4 over [1,3] (ii)cosh 3x-sinh4x over [0, ln2] (c)A particle is moving from rest ...
*May 14, 2012 by weloo*

**Physics **

Vector has a magnitude of 8.10 units and makes an angle of 52.0° with the positive x-axis. Vector also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods find the following. a) The vector sum Magnitude of A + B:___ units Direction ...
*September 29, 2013 by Griet*

**physics**

major leaguer hits a baseball so that it leaves the bat at a speed of 29.0m/s and the angles of 36.9 above horizontal ignore resistance what two time is the baseball at a height of 10.0m above the point at which it left the bat? *what two times is the baseball at a height of ...
*September 28, 2013 by deb*

**Physics**

A particle of mass m1 is tide to a string and describes a circumference on a horizontal plane. The string (of negligible mass)passes through a hole that is in the center of the plane and goes down vertically. At the lower end is tied another particle of m2. If the first ...
*November 11, 2012 by Leslie*

**Physics**

A raindrop of mass 57.40 mg (that is milli- gram) falls in quiet air (no wind). Due to the air resistance force, the drop has a maximum velocity called the terminal velocity of magnitude, 17.50 m/s, which is reached high above ground. What would be in N the weight of the rain ...
*September 8, 2011 by Andrew*

**Physics**

A raindrop of mass 61.60 mg (that is milli- gram) falls in quiet air (no wind). Due to the air resistance force, the drop has a maximum velocity called the terminal velocity of magnitude, 11.00 m/s, which is reached high above ground. What would be in N the weight of the rain ...
*September 9, 2011 by Elisabeth*

**math(mechanics)**

the acceleration of a particle as it moves along a straight line is given by a=(2t-1)m/s^2, where t is in seconds.if s=1m and v= 2m/s when t=0,determine the particles velocity and position when t=6s. Also, determine the total distance the particle travels during this time period.
*April 18, 2012 by chanz11*

**physics**

The displacement of a particle in centimeters is given by y=8 sin (2πft). If f=20 Hz, find the displacement and the velocity of the particle at a time t=0.01 s and 0.07 s. (ans: y=7.61 cm, v=3.11 m/s, y=4.70 cm, v= -8.13 m/s) After I plug in f to get w and switch to this ...
*January 23, 2013 by TOm*

**Physics-Mechaincs**

A 1.3 kg mass accelerates at 5.8 m/s2 in a direction 36◦ north of east. One of the two forces acting on the mass has a magnitude of 17.3 N and is directed north. Determine the magnitude of the second force. Answer in units of N.
*September 19, 2010 by Genevieve*

**physics**

A uniform electric field is directed upward and has a magnitude of 5 N/C. What are the magnitude and direction of the force on a charge of -3 C placed in this field? F=Eq E=5 q=-3 5(-3)=-15N Downward Ok I have the downward correct the -15 is incorrect. Did I use the wrong ...
*July 25, 2012 by kkpdiluvu*

**Physics -URGENT-**

A 2 kg mass accelerates at 5.7 m/s 2 in a direction 19◦ north of east. One of the two forces acting on the mass has a magnitude of 17.1 N and is directed north. Determine the magnitude of the second force. Answer in units of N
*October 13, 2013 by Jenna*

**Physics- 2D Collisions**

nitially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic? (Note, there are actually...
*March 29, 2011 by Rob*

**Math**

Joey kicks a football with an initial velocity of 42'/sec at an angle of 35 degrees to the horizon. what is the longest field goal he can make if the crossbar is 10' high?
*October 25, 2011 by Bob Clark*

**algebra**

An object is released into the air at an initial height of 6 feet and an initial velocity of 30 feet per second. The object is caught at a height of 7 feet. Use the vertical motion model, h = -16t^2+vt+s, where h in the height, t is the time in motion, s is the initial height...
*April 28, 2010 by alice*

**Physics**

1. What is indicated by a velocity-time graph that crosses the x-axis? 2. How can you tell by looking at a position-time graph whether or not the object was changing speed? 3. How can you tell by looking at a velocity-time graph whether or not the object was changing speed? 4...
*September 10, 2012 by PLEASE HELP- URGENT*

**Calculus**

A particle is moving around the unit circle radius = 1, at .6,.8 the horizontal velocity sx/st=3, what is vertical velocity dy/dt at that point?
*December 16, 2010 by J.*

**Physical Sciences**

How do I calculate the initial velocity of a ball if i've only given a maximum height of 12metres above its starting point?
*January 25, 2013 by Amanda*

**Math**

The displacement of a particle is given by: x=t^3-7/2t^2+2t-1. Find the particles initial displacement. And find when the particle is at rest.
*August 27, 2012 by Jeconiah*

**physics**

A projectile hits a target placed on a level field. It has arange of 37.0 m. The nagle of launch is 33.4 degrees above the horizontal. What was the initial speed?
*January 13, 2008 by Anne*

**Physics**

Five forces act simultaneously on Point A: the first 60N at 90 degrees, the second 40N at 0 degrees, the third 80N at 270 degrees, the fourth 40N at 180 degrees, and the fifth 50N at 60 degrees. What is the magnitude and direction of a sixth force that produces the ...
*November 2, 2008 by Kiley*

**physics**

A particle moves along the x axis. It is initially at the position 0.280 m, moving with velocity 0.080 m/s and acceleration -0.240 m/s2. Suppose it moves with constant acceleration for 3.10 s. (a) Find the position of the particle after this time. (b) Find its velocity at the ...
*May 18, 2011 by John*

**Physics**

A particle moves along the x axis. It is initially at the position 0.350 m, moving with velocity 0.110 m/s and acceleration -0.380 m/s2. Suppose it moves with constant acceleration for 3.50 s. (a) Find the position of the particle after this time. (b) Find its velocity at the ...
*May 19, 2011 by Luna*

**Physics**

A projectile motion thrown with velocity of 200m/s direction of 53 degree above the horizontal?determine height,range,total time,time at particle reach maximum height?
*September 30, 2012 by Anonymous*

**Physics**

A .30kg softball had a velocity of 15m/s at an angle of 35 degrees below the horizontal just before making contact with the bat. What is the magnitude of the change in momentum of the ball while it is in contact with the bat if the ball leaves the bat with a velocity of a)20m/...
*January 31, 2007 by Tammy*

**physics need help!**

I really need help on this Q, don;t know what to do with multtiple complex forces: A jet plane is flying with a constant speed along a straight line, at an angle of 27.0° above the horizontal, as Figure 4.30a indicates. The plane has weight whose magnitude is 86500 N, and its ...
*December 5, 2010 by angela*

**physics**

A cannonball is shot from a cannon on a cliff at a height of 18.9 m at a ship on the ocean. The cannonball is shot with an initial velocity of 15.1 m/s at an angle of 24.7 degrees above the horizontal. #1- What is the total maximum height of the cannonball (the height with ...
*November 24, 2009 by veronica*

**Physics**

Peggy drives from Cornwall to Atkins Glen in 52 min. Cornwall is 75 km from Illium in a direction 26° west of south. Atkins Glen is 27.1 km from Illium in a direction 16° south of west. Use Illium as your origin. (a) Draw the initial and final position vectors. (Do this on ...
*May 20, 2012 by Adam*

**physics(please help...very urgent.....)**

A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance. i have posted the same question earlier and i got some steps...
*April 12, 2011 by arun*

**math **

a rock is thrown straight up in the air from an initial height of ho, in metres, with the initial velocity vo, in metres per second. The height in metres above the ground after t seconds is given by h(t) = -4.9t^2 + vo + ho. Find an expression for the time it takes the rock to...
*November 29, 2013 by Kp*

**Physic**

If a person jumps 8.59m horizontelly and jumps at 23 degrees, what is his initial velocity? Plz and thank you.
*March 9, 2010 by Mike*

Pages: <<Prev | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | **12** | 13 | 14 | 15 | 16 | 17 | 18 | Next>>