Thursday

October 20, 2016
Number of results: 64,884

**Physics- Mechanics**

A particle has r(0)= (4m)j and v(0)= 92 m/s)i If uts acceleration is constant and given by a=-(2 m/s^2)(i+j), at what time t does the particle first cross the x axis?

*September 17, 2010 by Genevieve*

**math**

A particle moves along the s-axis. Use the given information to find the position of the particle. v(t)=8t3 ; s(0) = 5.

*December 19, 2010 by Elisa*

**calculus**

The force on a particle is described 1 at a point x along the x-axis. Find the work done in moving the particle from the origin to x=3

*June 2, 2011 by Kim*

**Physic**

A 10 kg particle moving along the x-axis experiences the force shown in figure. The particle goes from v=1.0m/s at x=0 and v=5.0 m/s at x=2. What is the f max?

*October 30, 2012 by J*

**relative velocity**

A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 159km away. The radar antenna is pointing upward at an angle of 59.3 from the ground.Fine the x and y components(in km) of the position of the satellite ...

*February 1, 2007 by leann*

**physics**

The electric field E_1 at one face of a parallelepiped is uniform over the entire face and is directed out of the face. At the opposite face, the electric field E_2 is also uniform over the entire face and is directed into that face (the figure ). The two faces in question are...

*February 19, 2011 by ami*

**physics **

At t = 0, a particle leaves the origin with a velocity of 9 m/s in the positive y direction and moves in the xy plane with a constant acceleration of (-2 i -4 j) m/s2. At t = 1 s, what is the velocity of the particle in the x direction? I need explanation for this question !

*November 11, 2010 by meer*

**physics**

An infinite sheet with a surface charge density of -2.1 micro-coulombs/m2 runs parallel to the x axis. Another infinite sheet a surface charge density of +2.1 micro-coulombs/m2 runs parallel to the y axis. A charge of -4.1 micro-coulombs moves at a 45 degree angle towards the ...

*February 10, 2012 by Mandaleigh*

**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. ...

*February 19, 2014 by Fabricus*

**physics**

Three charges are fixed to an x, y coordinate system. A charge of +12 µC is on the y axis at y = +3.0 m. A charge of -14 µC is at the origin. Lastly, a charge of +50 µC is on the x axis at x = +3.0 m. Determine the magnitude and direction of the net ...

*January 23, 2007 by Ann*

**Calculus**

a particle moves along a line so that at any time t its position is given by x(t)=2(pi)t + cos2(pi)t find velocity find acceleration what are the values of t, 0<t<3, for which the particle is at rest? what is the maximum velocity?

*November 30, 2010 by John*

**physics**

A 2.6-kg particle moving along the x axis has a velocity of +1.7 m/s as it passes through the origin. It is subjected to a single force, Fx, that varies with position, as shown below.

*March 26, 2013 by Brandon*

**Physics**

A rock is thrown vertically from the edge of a cliff that is 500 ft high. It takes 6.5 seconds for the rock to hit the ground at the base of the cliff. Assume air resistance is negligible. (a) What was the initial velocity (magnitude and direction) of the rock? (b) What was ...

*September 21, 2012 by josephz*

**Physics**

Two boxes on a horizontal surface, as shown in the figure above, are moving together under the influence of a horizontal force, F. The coefficient of kinetic friction between the boxes and the surface is 0.40. Use g = 10 m/s2. In case (a), a horizontal force F directed right ...

*October 10, 2011 by Jeanne*

**Physics**

A man stands on the roof of a 15m tall building and throws a rock with a velocity of magnitude 30m/s at an angle of 33deg above the horizontal. Ignore air resistance. Calculate: a) the maximum heigh above the roof reached by the rock b) the magnitude of the velocity of the ...

*September 26, 2011 by Kyle*

**physics**

A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.10 m/s and her body makes an angle of 77.0° with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude and ...

*February 7, 2010 by james*

**physics**

A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.00 m/s and her body makes an angle of 71.0° with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude and ...

*November 3, 2010 by tom*

**physics**

A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.30 m/s and her body makes an angle of 83.0° with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude and ...

*February 7, 2011 by help*

**physics**

Which one of the following statements about an object performing Simple Harmonic Motion is TRUE? Select one: a. The object reaches its maximum speed as it passes through the equilibrium point. b. The object’s velocity is never zero. c. The object has a constant velocity. d. ...

*June 15, 2014 by jake*

**Physics**

From the window of a building, a ball is tossed from a height y0 above the ground with an initial velocity of 8.00 m/s and angle of 20.0 degrees below the horizontal. It strikes the ground 3.00 s later. (a) If the base of the building is taken to be the origin of the ...

*September 21, 2009 by Vico*

**physics(Please check)**

Vector A has a magnitude of 3.0 m and direction 1o3 degrees relative to the positive x-axis. Vector B has magnitude 5.0m and direction 215 relative to the positive x-axis. 1) The resultant R=A + B has magnitude? I did Rx= 3 cos 103 + 5 cos 215 Ry=3 sin 103 + 5 sin 215 Then ...

*June 20, 2012 by Hannah*

**college physics**

There are four charges, each with a magnitude of 2.0uC. Two are postive and two are negative. The charges are fixed to the corners of a 3.0m square, one to each corner, in such a way that the net force on any charge is directed toward the center of the square. Find the ...

*September 17, 2009 by erin*

**physics**

A 16000 kg sailboat experiences an eastward force of 17700 N due to tide pushing its hull while the wind pushes the sails with a force of 87500 N directed toward the northwest (45 degrees westward of North or 45 degrees northward of West). What is the magnitude of the ...

*March 24, 2011 by Rebecca*

**Linear Momentum in Rotational motion**

It is known that for a mass (m) that moves with velocity (v) the linear momentum is (m)x(v). Now, assume we have a rod of mass (m) and radius (R) that rotates with constant angular velocity (w). Also, isolate only half of the cycle (rotation for 180 degrees). What is the ...

*February 11, 2007 by Nikos*

**Calculus**

A particle moves along the x-axis with position at time t given by x(t)=e^(-t)sin(t) for 0 is less than or equal to t which is less than or equal to 2 pi. a) Find the time t at which the particle is farthest to the left. Justify your answer I think you have to find the prime ...

*November 29, 2010 by Leanna*

**Calculus**

A particle moves along the x-axis with position at time t given by x(t)=e^(-t)sin(t) for 0 is less than or equal to t which is less than or equal to 2 pi. a) Find the time t at which the particle is farthest to the left. Justify your answer I think you have to find the prime ...

*November 29, 2010 by Leanna*

**Calculus!!!!**

A particle moves along the x-axis with position at time t given by x(t)=e^(-t)sin(t) for 0 is less than or equal to t which is less than or equal to 2 pi. a) Find the time t at which the particle is farthest to the left. Justify your answer I think you have to find the prime ...

*November 29, 2010 by Leanna*

**Physics**

Hey, I'm studying for my physics class, and I'm not sure how to solve this problem. Can someone walk me through it please? I'd really appreciate any help! John throws a baseball from the edge of a cliff with an initial velocity of 17.0 m/s at an angle 27.0° above the ...

*February 28, 2015 by James*

**physics**

A sky diver of mass 68 kg jumps from a slowly moving aircraft and eventually reaches her terminal velocity 46m/s Now consider the same sky diver jumping out of a faster airplane. At some point before she reaches her terminal velocity, she has velocity v2 of magnitude 46.5 m/s ...

*September 16, 2012 by kat*

**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**

I would really appreciate the help for this assignment. A small reasoning for the answer would be very helpful. Thank you. A sphere of mass m and radius r is attached to the rim of a disk (mass M, radius R). The disk is rotating counter-clockwise with a constant period T ...

*October 31, 2014 by Kyle*

**Math**

For a track and field athlete who can jump vertically, his distance above the ground is given by the formula s = 3.3t - 4.9t2. What is his initial velocity? velocity in m/s = My Answer S'= 3.3-9.8t S'(0) = 3.3 velocity in m/s = 3.3 Can you please confirm this answer Thanks

*January 29, 2013 by Brownie*

**Calc - Please help**

A particle moves along the s-axis. Use the given information to find the position of the particle. v(t) = 8t3; s(0) = 5.

*December 19, 2010 by Elisa*

**Ap calc**

A particle moves along the X axis with the acceleration a(t)=12t-6. If v(0)=3, find the total distance the particle traveled from t=0 to t=2. Please help

*March 11, 2015 by Lynds*

**physics **

Consider two vectors where F1 = 53 N, F2 = 81 N, 1 = 320 , and 2 = 13 ,measured from the positive x axis with the counter-clockwise. What is the magnitude of the resulting vector?

*January 16, 2013 by sarah*

**math**

a particle moves along the x-axis so that its velocity is proportional to x^2. Prove that its acceleration is proportional to x^3

*June 2, 2013 by Gloria*

**Physics**

The three vectors have magnitude a =3m, b= 4m and c=10m . On the x axis is vector a at 0 degrees then 30 degrees is vector b then 120 degrees is vector c. If vector c =p*vector a + q*vector b .What are the values of p? and q? I am expose to get -6.67 for p and then 4.33 for q...

*October 6, 2006 by Jenny*

**Physics**

Soccer player kicks a ball down field. The ball's initial velocity is 30 m/s, 30 degrees above horizontal. a) What is the ball's horizontal velocity at the maximum height of the ball's trajectory? b) What is the horizontal displacement of the ball just before it lands down field?

*January 29, 2012 by Sejul*

**Physics**

A particle leaves its orgin with a velocity of 4 i m/s and a constant acceleration of (-2i + .5j) m/s^2. At the time the particle reaches its maximum X corrdinate a) what is its velocity? b) what is its position vector? I'm not sure which equations i should use. solve for the ...

*November 2, 2006 by Bax*

**Physics**

A 46.5-cm diameter disk rotates with a constant angular acceleration of 2.4 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. (Hint: Remember the...

*November 30, 2009 by Ed*

**greatbay community college**

A 5.00 kg stone is thrown upward at 7.50 m/s at an angle of 51.0 degrees above the horizontal from the upper edge of a cliff, and it hits the ground 1.50 s later with no air drag. Find the magnitude of its velocity vector just as it reaches the ground.

*July 31, 2014 by Anonymous*

**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 ...

*February 14, 2010 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 ...

*February 22, 2010 by Alex*

**physics**

If an object is initially moving with a constant velocity of 20m/s towards positive x-axis and after 5 sec it changes its direction and moving at an angle of 30o with x-axis, find magnitude and direction of its acceleration.

*October 26, 2014 by Anonymous*

**Physics I (Classical)**

At some instant, a particle traveling in a horizontal circular path of radius 7.50 m has a total acceleration with a magnitude of 16.0 m/s2 and a constant tangential acceleration of 12.0 m/s2. Determine the speed of the particle at this instant and (1/8) revolution later. I ...

*June 5, 2016 by Victoria*

**Physics**

Three students converge on the last textbook in the store. All three grab it and begin to pull in the directions shown in the above figure. Student A exerts a force of 77.64 N, student B pulls with a force of 18.52 N, and student C pulls with a force of 66.43 N at an angle &#...

*February 4, 2016 by Emily*

**physics**

In the graph above, what is the correct discription of any location to the left of zero ? a.negative displacement b.negative distance c.negative position d. negative change of description

*February 28, 2012 by Anonymous*

**Physics**

A 1.50 kg snowball is fired from a cliff 13.0 m high with an initial velocity of 14.0 m/s, directed 41.0° above the horizontal. (a) Using energy techniques, rather than techniques of Chapter 4, find the speed of the snowball as it reaches the ground below the cliff. m/s (b) ...

*July 24, 2010 by Matt*

**Physics**

What are the components of a vector of magnitude 1.5 m at an angle of 35 degrees from the positive x-axis?

*January 19, 2011 by Kylee*

**Physics - Spring Gun**

A toy gun uses a spring to shoot a ball with a mass of 5.0 g. The spring is “loaded” by compressing it 5.0 cm and has a spring constant of 288 N/m. The end of the spring is at the end of the gun (the ball does not travel any distance inside the gun after the spring) and the ...

*October 13, 2014 by Sam*

**Calculus**

If the equation of motion of a particle is given by s = A cos(ωt + δ), the particle is said to undergo simple harmonic motion. (a) Find the velocity of the particle at time t. s'(t) = - A ω sin(ωt + δ) I figured out how to do part a, but I don't know ...

*November 8, 2011 by nyk*

**Physics**

A toy gun uses a spring to shoot a ball with a mass of 5.0 g. The spring is “loaded” by compressing it 5.0 cm and has a spring constant of 288 N/m. The end of the spring is at the end of the gun (the ball does not travel any distance inside the gun after the spring) and the ...

*October 10, 2014 by John*

**Calculus - Still Need Help! Anyone!**

A particle moves along the x-axis with position at time t given by x(t)=e^(-t)sin(t) for 0 is less than or equal to t which is less than or equal to 2 pi. a) Find the time t at which the particle is farthest to the left. Justify your answer I think you have to find the prime ...

*November 29, 2010 by Leanna*

**Physics**

A 10kg particle undergoes simple harmonic motion with an amplitude of 2.0mm, a maximum acceleration of 8.0x10^3 m/s^2, and an unknown phase constant (phi) What are: a.) the period of the motion b.) the maximum speed of the particle c.) total mechanical energy of the oscillator...

*November 30, 2010 by Greg*

**math / science**

find the vector with all of the following properties: magnitude 10 angle of 45 degrees with positive x-axis angle of 75 with positive y-axis positive k component

*December 11, 2011 by Clarissa *

**physics**

1) Mass m1 = 0.7 kg moves with constant velocity v1i = 2.0 m/s along the x-axis and collides with mass m2 = 1.8 kg, which moves with velocity v2i = 3.4 m/s, as sketched below. After the collision, m1 and m2 stick together. Find the angle, θ, between the x-axis and the ...

*October 13, 2012 by Jim*

**physics**

1) Mass m1 = 0.7 kg moves with constant velocity v1i = 2.0 m/s along the x-axis and collides with mass m2 = 1.8 kg, which moves with velocity v2i = 3.4 m/s, as sketched below. After the collision, m1 and m2 stick together. Find the angle, θ, between the x-axis and the ...

*October 13, 2012 by Jim*

**Physics HELP PLEASE!**

A kickoff sends a football with an initial velocity of 25 m/s at an angle of 50 degrees above the horizontal. a) find the x and y components of the velocity b) find the time the ball is in the air c) find the horizontal distance the ball travels before hitting the ground d) ...

*January 12, 2012 by C.*

**Physics**

How fast (in rpm) must a centrifuge rotate if a particle 8.55 cm from the axis of rotation is to experience an acceleration of 1000 g's? (use 9.8 m/s^2) You may assume constant angular velocity.

*March 17, 2015 by Sarah*

**Calculus**

Two particles move along the x -axis. For 0 is less than or equal to t is less than or equal to 6, the position of particle P at time t is given by p(t)=2cos((pi/4)t), while the position of particle R at time t is given by r(t)=t^3 -6t^2 +9t+3. 1. For 0 is less than or equal ...

*December 19, 2012 by Madeline*

**Calculus**

Two particles move along the x -axis. For 0 is less than or equal to t is less than or equal to 6, the position of particle P at time t is given by p(t)=2cos((pi/4)t), while the position of particle R at time t is given by r(t)=t^3 -6t^2 +9t+3. 1. For 0 is less than or equal ...

*December 19, 2012 by Madeline*

**Calc3**

A particle initially at the origin travels in uniform motion with velocity v=2i-j-2k. Find position venctor vector r(t) of a particle at time t. Find equatio for the plane passing through the origin and perp. to the tragectory of the particle. And find when and where the ...

*September 18, 2012 by Margo*

**physics**

Three equal positive point charges of magnitude Q = 4.00ì C are located at three corners of a square of edge length d = 6.9 cm. A negative charge -14.00ì C is placed on the fourth corner. At the position of the negative charge, what is the magnitude of the electric field due ...

*January 21, 2010 by farah*

**physics**

Three equal positive point charges of magnitude Q = 8.00ì C are located at three corners of a square of edge length d = 11.8 cm. A negative charge -24.00ì C is placed on the fourth corner. At the position of the negative charge, what is the magnitude of the electric field due ...

*September 1, 2011 by TP*

**Physics**

A smooth plane AB is 10 meters long, It is inclined at 30 degrees to the horizontal with the lower end, B, 6 meteres vertically above horixontal ground. A particle is placed on the plane at the upper end, A, and then released from erst so that it slides down the plane. Find ...

*February 4, 2012 by Chris*

**Physics**

A 46.5-cm diameter disk rotates with a constant angular acceleration of 2.4 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. (Hint: Remember the...

*November 28, 2009 by Ed*

**Physics**

A projectile of mass 0.46 kg is shot from a cannon, at height 6.8 m, as shown in the ﬁgure, with an initial velocity vi having a horizontal component of 7.1m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and strikes the ...

*September 26, 2011 by yolanda*

**Physics**

A projectile of mass 0.46 kg is shot from a cannon, at height 6.8 m, as shown in the ﬁgure, with an initial velocity vi having a horizontal component of 7.1m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and strikes the ...

*September 26, 2011 by yolanda*

**Physics**

A projectile of mass 0.46 kg is shot from a cannon, at height 6.8 m, as shown in the ﬁgure, with an initial velocity vi having a horizontal component of 7.1m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and strikes the ...

*September 26, 2011 by yolanda*

**College Physics**

A golf ball is it with the initial velocity of 50.0 m/s at an angle of 55 degrees above the horizontal. (a) How high will the ball go? (b) What is the total time the ball is in the air? (c) How far will the ball travel horizontally before it hits the ground?

*May 31, 2012 by Christine*

**Physics**

A stone is aimed at a cliff of height h with an initial speed of v = 54.0 m/s directed 55.0° above the horizontal, as shown in the Figure below by the arrow. The stone strikes at A, 7.31 s after launching. What is the height of the cliff? What is the maximum height H reached ...

*December 2, 2015 by Anonymous*

**physics**

A Bainbridge mass spectrometer is shown in the figure. A charged particle with mass m, charge |q|=3.2 ×10−19C and speed v=3 ×10@6 m/s enters from the bottom of the figure and traces out the trajectory shown in the fields shown. The only electric field E=11 ×103 V/m is in...

*April 26, 2013 by sat*

**physics - electric field**

a point particle with charge q= 4/5 uC is placed on the x-axis at x=-10cm. A second particle of charge Q is now placed on the x-axis at x = 25cm, and its found that the electric field at the origin is zero. Find Q.

*January 17, 2011 by J Velji*

**physics - electric field**

a point particle with charge q= 4/5 uC is placed on the x-axis at x=-10cm. A second particle of charge Q is now placed on the x-axis at x = 25cm, and its found that the electric field at the origin is zero. Find Q.

*January 17, 2011 by J Velji*

**physics**

Initially, a particle is moving at 4.20m/s at an angle of 34.5∘ above the horizontal. Two seconds later, its velocity is 6.50m/s at an angle of 50.0∘ below the horizontal. What was the particle's average acceleration during these 2.00 seconds?

*September 21, 2014 by name*

**physics**

Initially, a particle is moving at 5.45 m/s at an angle of 38.5° above the horizontal. Four seconds later, its velocity is 6.24 m/s at an angle of 54.3° below the horizontal. What was the particle's average acceleration during these 4.00 seconds in the x-direction (enter first...

*February 4, 2015 by Brad*

**College Math**

An object is projected vertically upward with an initial velocity of v0 ft/sec, and its distance s(t) in feet above the ground after t seconds is given by the formula s(t) = −16t^2 + v0t. (a) If the object hits the ground after 8 seconds, find its initial velocity v0. v0...

*November 10, 2014 by Kyle *

**pysics**

A projectile of mass 0.777 kg is shot from a cannon, at height 6.6 m, as shown in the ﬁgure, with an initial velocity vi having a horizontal component of 7.8m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel and strikes the ...

*October 4, 2011 by steve*

**Physics**

Initially, a particle is moving at 5.40 m/s at an angle of 37.2° above the horizontal. Two seconds later, its velocity is 6.10 m/s at an angle of 55.0° below the horizontal. What was the particle's average acceleration during these 2.00 seconds in the x-direction and the y-...

*September 10, 2012 by Sam*

**physics**

The solar wind is a thin, hot gas given off by the sun. Charged particles in this gas enter the magnetic field of the earth and can experience a magnetic force. Suppose a charged particle traveling with a speed of 9.80 x 10^6 m/s encounters the earth's magnetic field at an ...

*February 8, 2011 by aml*

**physics**

A man is standing beneath two rain clouds, equidistant from each cloud, as shown in the figure. Cloud A has an excess of 7.1 104 negative charges while cloud B has 7.1 104 positive charges (where a charge has magnitude e). (a) What is the magnitude of the net electric field ...

*September 2, 2015 by kate*

**Physics**

A place kicker must kick the football from a point 34.2 m from the goal and clear a bar 3.00 m above the ground. The ball leaves the ground with a speed of 20.0 m/s at an angle of 53.0 degrees above the horizontal. (a) By how much (m) does the ball clear (positive value) or ...

*August 6, 2011 by waqas*

**physics**

The average velocity for a trip has a positive value. Is it possible for the instantaneous velocity at any point during the trip to have a negative value? (I'm thinking yes because derivatives can be negative but I'm not sure). also A ball is dropped from rest from the top of ...

*January 2, 2009 by Anonymous*

**math**

When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -5t^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 ...

*June 15, 2010 by Anne*

**Physics- Algebra based**

A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.10 m/s and her body makes an angle of 80.0° with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude and ...

*February 5, 2011 by Bailey*

**physics **

Vector A has magnitude 8.0 units at an angle of 60o from the x-axis. Vector B has magnitude 6.0 at an angle of -30o from the x-axis. Find the magnitude and direction of vector C = A + B I tried actually drawing it to see if it would help but it didn't I'm pretty sure the ...

*September 19, 2015 by JOHN SMITH*

**Physics**

Cn u plz gv explaination 2 d solutions bit by bit in brief? Cz i really dnt understand hw 2 apply d formula 2 solve it when i revise nw.Thnkz. [g=10 m/s^2 ]a particle P of mass m kg on a rough horizontal table. The coefficient of friction between P & the table is 1 /4. The ...

*September 29, 2008 by Ling*

**physics**

As a bowling ball of radius 14.9 cm rolls down the alley to the right, a frictional force of magnitude 1.43 N, directed to the left, acts on it. Find the frictional torque with respect to an axis through the center of the ball.

*April 25, 2010 by Michael*

**physics**

As a bowling ball of radius 15.9 cm rolls down the alley to the right, a frictional force of magnitude 1.46 N, directed to the left, acts on it. Find the frictional torque with respect to an axis through the center of the ball.

*March 14, 2012 by John*

**physics**

As a bowling ball of radius 15.9 cm rolls down the alley to the right, a frictional force of magnitude 1.46 N, directed to the left, acts on it. Find the frictional torque with respect to an axis through the center of the ball.

*March 14, 2012 by John*

**physics**

Vector A ⃗ {\rm \vec A} points in the negative x x direction. Vector B ⃗ {\rm \vec B} points at an angle of 35.0 ∘ ^\circ above the positive x x axis. Vector C ⃗ {\rm \vec C} has a magnitude of 19m m and points in a direction 37.0 ∘ ^\circ below ...

*September 7, 2013 by Anonymous*

**math**

im trying to help my son any help would be great When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -16t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the initial velocity (speed) in ft/sec and “k” is the...

*January 12, 2010 by joni*

**Trigonometry**

Find the magnitude and direction of the resultant of two forces of 250 pounds and 45 pounds at angles of 25 degrees and 250 degrees with the x-axis, respectively.

*March 9, 2008 by Anonymous*

**Physics**

A test rocket is fired vertically upward from a well. A catapult gives it an initial speed of 80.2 m/s at ground level. Its engines then fire and it accelerates upward at 4.20 m/s2 until it reaches an altitude of 960 m. At that point its engines fail, and the rocket goes into ...

*October 11, 2009 by Becky*

**physics**

A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 9.50 m/s at an angle of 24.0° below the horizontal. It strikes the ground 5.00 s later. (a) How far horizontally from the base of the building does the ball strike the ground? ...

*May 16, 2007 by micole*

**physics**

A 65 kg diver jumps off of a 10.0 m tower. a. Find the diver's velocity when he hits the water. b. The diver comes to a stop 2.0 m below the surface. Find the net force exerted by the water. Ok, im confused, I found velocity which is 14. But for the net force im confused on ...

*December 24, 2009 by Heart*

**PHYSICS**

what are the components of a vector that has a magnitude of 1.5 m at the angle of 35 degrees with respect to the positive x axis

*December 22, 2010 by Katie*

**physics**

Only two forces act on an object (mass = 4.00 kg), as in the drawing. Find the magnitude and direction (relative to the x axis) of the acceleration of the object. Ftotal=Sqrt(60^2+40^2)=72.11(N) Angle=tan-1(60/40)= 56.3° (How did you get 56.3°) a= F/m=72.11/4=18(m/s/s) The ...

*October 25, 2012 by Anonymous*

**physics**

What are the magnitude and direction of the particle’s acceleration? If a particle is moving along an x axis with a constant acceleration. Some points on the graph are (0, -2), (1,0), (2,6). I got 6 m/s to the right. is this correct? << got 6 m/s to the right. is this ...

*September 17, 2006 by ben*

**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 5.00 s later. By how much does the ball clear or fall short (vertically) of clearing the ...

*October 12, 2012 by Bill*