Wednesday

July 23, 2014

July 23, 2014

Number of results: 43,624

**Physics, science**

A billiard ball moving with a speed of +4 m/s runs head on into the back of another ball moving with a speed of +2 m/s. After the collision the first ball was measured to be moving with a speed of +2 m/s. Find the speed of the second ball. formula = mivi+m2v2= mivi+m2v2 so far...
*December 18, 2011 by Bassel*

**physics**

A softball of mass 0.220 kg that is moving with a speed of 6.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward it is found that the incoming ball has bounced backward with a speed of 4.8 m/s. Calculate the mass of...
*December 9, 2009 by Shane*

**physics**

croquet ball must have a set mass of 0.50 kg. a red ball moving at 10.0 m/s, strikes an at-rest green ball head on. The red ball continues moving at 1.5 m/s after it hits the green ball. What is the final speed of the green ball?
*May 15, 2014 by Jean*

**Physics**

Please, help me answer this question. Two balls are moving in the same direction. Ball A has half the mass of ball B, and is moving at twice its speed. (a) Which ball has the greater momentum? (b) Which ball has greater kinetic energy? Thank you
*May 2, 2013 by Kathy*

**phyics**

A 0.2 kg plastic ball moves with a velocity of 1.5 m/s. It collides with a second plastic ball of mass 1.8 kg, which is moving along the same line at a speed of 0.1 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 1.8 kg ...
*April 11, 2013 by MEEEEE*

**physics**

A stationary billiard ball, mass 0.17 kg, is struck by an identical ball moving at 4.8 m/s. After the collision, the second ball moves off at 60° to the left of its original direction. The stationary ball moves off at 30° to the right of the moving ball's original direction. ...
*January 24, 2013 by Anonymous*

**PHYSICS (most is worked)**

A glass ball, ball A, of mass 6.0 g moves at a velocity of 18.0 cm/s. It collides with a second ball, ball B, of mass 8.0 g, moving along the same line of velocity of 11.0 cm/s. After the collision, ball A is still moving, but with a velocity of 10.0 cm/s. Ball A's original ...
*January 28, 2013 by Jessica*

**physics**

A .50kg ball is rolling on a frictionless surface at a speed of .75m/s. it collides with a second ball with a mass of 1kg which is also moving in the same direction as the first ball with a speed of .38m/s. After the collision the firt ball continues at a reduced speed of .35m...
*March 26, 2011 by Mari*

**physics**

A softball of mass 0.220 kg that is moving with a speed of 5.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward it is found that the incoming ball has bounced backward with a speed of 3.9 m/s. (a) Calculate the ...
*January 10, 2010 by Anonymous*

**physics - PLEASE HELP**

A softball of mass 0.220 kg that is moving with a speed of 6.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward it is found that the incoming ball has bounced backward with a speed of 4.8 m/s. (a) Calculate the ...
*December 10, 2009 by Anonymous*

**physics**

Billiard ball A of mass mA=0.400kg moving with speed vA=1.80m/s strikes ball B, initially at rest of mass mB=0.500kg. As a result of the collision, ball A is deflected off at an angle of 30.0 degrees with a speed of vA=1.10m/s. (a) Taking the x axis to be the original ...
*April 14, 2011 by shahzi*

**Physics**

A glass ball, ball A, of mass 6.0 g moves at a velocity of 19.0 cm/s. It collides with a second ball, ball B, of mass 9.0 g, moving along the same line of velocity of 11.0 cm/s. After the collison, ball A is still moving, but with a velocity of 8.0 cm/s. a) What was ball A's ...
*November 7, 2007 by Jessica*

**Physics (MOMENTUM)**

Please, help me answer this question. Two balls are moving in the same direction. Ball A has half the mass of ball B, and is moving at twice its speed. (a) Which ball has the greater momentum? (b) Which ball has greater kinetic energy? Thank you.
*May 2, 2013 by Kathy*

**physics**

A 0.203 kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.106 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction, and the speed of the...
*April 7, 2011 by Joey*

**physics**

A 0.210 kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.109 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction, and the speed of the...
*April 7, 2011 by James*

**physics**

A 0.210 kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.109 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction, and the speed of the...
*April 8, 2011 by James*

**Physics (ASAP PLEASE)**

Please, help me answer this question. Two balls are moving in the same direction. Ball A has half the mass of ball B, and is moving at twice its speed. (a) Which ball has the greater momentum? (b) Which ball has greater kinetic energy? Thank you
*May 3, 2013 by Kathy*

**physics- PLEASE HELP**

2. A .12 kg ball is moving at 6 m/s when it is hit by a bat, causing it to reverse direction and have a speed of 14 m/s. What is the change in the magnitude of the momentum of the ball? 4. Lonnie pitches a baseball of mass .2 kg. The ball arrives at home plate with a speed of ...
*December 3, 2008 by kim*

**physics**

a ball of mass m , moving with uniform speed, collides elastically with another stationary ball.the incident ball will lose maximum kinetic energy when the mass of the stationary ball is?
*April 11, 2012 by srikala*

**Physics**

A ball with a mass of 12 g is moving at 15 m/s. It collides with a second ball with a mass of 36 g moving at 5 m/s in the same direction. After the collision, the 12-g ball moves at 6.0 m/s. How great is the change in momentum of the z36-g ball?
*May 11, 2014 by Ali*

**phy**

A ball of mass 0.540 kg moving east (+x direction) with a speed of 3.30 m/s collides head-on with a 0.740 kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision? a)ball originally at rest m/s b)ball ...
*October 7, 2010 by ami*

**physics**

A soccer ball with mass 0.410 kg is initially moving with speed 4.30 m/s. A soccer player kicks the ball, exerting a constant force of magnitude 44.0 N in the same direction as the ball's motion. Over what distance must the player's foot be in contact with the ball to increase...
*February 25, 2009 by nikki*

**physics.**

1) A racing car has a mass of 1525 kg. What is its kinetic energy if it has a speed of 35 m/s? * 2-3 Conservation of Momentum 2) A 3.0 kg ball is moving at 3 m/s and strikes a 1.5 kg ball moving at -2 m/s. After the collision, the 1.5 kg ball moves to the right at 2 m/s. What ...
*March 18, 2013 by Isis*

**physics**

A 0.200 kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.100 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0....
*December 25, 2009 by Heart*

**physics**

A white billiard ball with mass mw = 1.32 kg is moving directly to the right with a speed of v = 2.91 m/s and collides elastically with a black billiard ball with the same mass mb = 1.32 kg that is initially at rest. The two collide elastically and the white ball ends up ...
*March 10, 2013 by Anonymous*

**physics**

A 0.201-kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.105 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0....
*December 18, 2012 by Noah*

**Physics**

A 0.201-kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.105 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0....
*December 19, 2012 by Noah*

**physics**

A 0.201-kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.105 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0....
*December 20, 2012 by Anonymous,*

**Physics**

A ball of mass 0.640 kg moving east (+x direction) with a speed of 3.10 m/s collides head-on with a 0.780 kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision? 1. ball originally at rest 2. ball ...
*November 24, 2009 by Fred*

**Physics**

Will you check my work and help me with the last two problems please? A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? -(12 kg/m/s) / 4kg=3m/s A ball is moving at 4 m/s and has a momentum of 48 kg m/s. What is the ball's mass? -(48kg/m/s) / (4m/s) =12 kg A 1-...
*October 14, 2007 by Soly*

**physics**

Will check my work and help me with the last two problems please? A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? -(12 kg/m/s) / 4kg=3m/s A ball is moving at 4 m/s and has a momentum of 48 kg m/s. What is the ball's mass? -(48kg/m/s) / (4m/s) =12 kg A 1-kg ...
*October 15, 2007 by Soly*

**Physics**

A ball is moving at 82 m/s when it hits a ball at rest which has a mass fours times as big as its own. The formally stationary ball leaves the collision with a speed of 7.5 m/s what is the final velocity of the first ball?
*March 21, 2012 by Becky*

**Physics**

A ball with a mass of 5.8 kg is moving to the right at 10.3 m/s and collides with a stationary ball of mass 10.9 kg. After the collision, the 5.8 kg ball moves to the right, but at an angle of 20° below the horizontal, at a speed of 4.3 m/s. Find the speed of the 10.9 kg ball ...
*December 20, 2012 by Shawn*

**physical science **

Which of the following four bodies has the greatest kinetic energy? a. A body of mass 1 kg moving with speed 1000 m/s. b. A body of mass 2 kg moving with speed 50 m/s c. A body of mass 3 kg moving with speed 50 m/s d. A body of mass 50 kg moving with speed 2 m/s e. A body of ...
*December 15, 2011 by Fonda*

**physics**

A 0.060 kg tennis ball, moving with a speed 2.50 m/s, collides head on with a 0.090kg ball initially moving away from it at a speed of 1.15 m/s. Assuming a perfectly elastic collision, what are the speed and direction of each ball after the collision?
*August 19, 2010 by joy*

**PHYSICS!!**

I've tried this problem again and again using conservation of momentum and energy but I am not having any luck: A ball of mass 0.300kg that is moving with a speed of 8.0m/s collides head-on and elastically with another ball initially at rest. Immediately after the collision, ...
*October 11, 2013 by Alison*

**Physics Problems**

Will check my work and help me with the last two problems please? A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? -(12 kg/m/s) / 4kg=3m/s A ball is moving at 4 m/s and has a momentum of 48 kg m/s. What is the ball's mass? -(48kg/m/s) / (4m/s) =12 kg A 1-kg ...
*October 13, 2007 by Soly*

**physics**

a golf ball of mass 0.045kg is moving in the x-direction with a speed of 9.0 m/s, and a baseball with mass 0.145kg is moving in a negative y-directionwith a speed of 7m/s. what are the magnitude and direction of the total momentum of the system consisting of the two balls?
*September 23, 2013 by daisy jean*

**Physics**

A softball of mass 0.200 kg that is moving with a speed of 8.2 m/s collides head-on and elastically with another ball initially at rest. Afterward the incoming softball bounces backward with a speed of 3.9 m/s. 1. Calculate the velocity of the target ball after the collision. ...
*November 12, 2009 by Anonymous*

**physics**

Two billiard balls of equal mass move at right angles and meet at the origin of an xy coordinate system. Ball A is moving upward along the y axis at v_A = 2.0m/s , and ball B is moving to the right along the x axis with speed v_B = 5.0m/s . After the collision, assumed elastic...
*November 28, 2012 by nammilee*

**physics**

A softball of mass 0.220 kg that is moving with a speed of 4.0 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward the incoming softball bounces backward with a speed of 1.8 m/s. a) Calculate the velocity of the ...
*May 30, 2011 by Nick*

**physics**

A softball of mass 0.220 kg that is moving with a speed of 4.0 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward the incoming softball bounces backward with a speed of 1.8 m/s. a) Calculate the velocity of the ...
*May 31, 2011 by Nick*

**physic**

a golf ball of mass 0.045 kg is moving in the +x direction with a speed of 9.0 m/s, and a baseball of mass 0.145 kg is moving in the -y direction with a speed of 7.0 m/s. What are the magnitude and direction if the total momentum of the system consisting of the two balls?
*September 23, 2012 by jaymark*

**college physics**

A ball of mass 0.70 kg moving with speed of 1.0 m/s hits a wall and bounces back with the same speed in the opposite direction. What is the change in the ball's kinetic energy?
*February 27, 2011 by craig45*

**Physics**

A ball of mass 0.640 kg moving east (+x direction) with a speed of 3.00 m/s collides head-on with a 0.740 kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision?
*December 19, 2010 by Brittany*

**physics**

A ball of mass 0.440 kg moving east (+x direction) with a speed of 3.80 m/s collides head-on with a 0.600 kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision?
*July 11, 2012 by Danielle*

**physics**

A softball of mass 0.220 kg that is moving with a speed of 5.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward it is found that the incoming ball has bounced backward with a speed of 3.9 m/s.
*January 10, 2010 by Anonymous*

**physics**

Calculate the magnitude of the linear momentum for the following cases. (a) a proton with mass 1.67 10-27 kg, moving with a speed of 4.00 106 m/s (b) a 16.5 g bullet moving with a speed of 270 m/s (c) a 70.5 kg sprinter running with a speed of 12.5 m/s (d) the Earth (mass = 5....
*July 7, 2008 by Elisa*

**physics**

A rubber ball is attached to a paddle by a rubber band. The ball is initially moving away from the paddle with a speed of 5.5 m/s. After 0.35 s, the ball is moving toward the paddle with a speed of 5.5 m/s. What is the average acceleration of the ball during that 0.35 s? Give ...
*February 7, 2010 by dale*

**Physics**

A rubber ball is attached to a paddle by a rubber band. The ball is initially moving away from the paddle with a speed of 4.0 m/s. After 0.25 s, the ball is moving toward the paddle with a speed of 3.0 m/s. What is the average acceleration of the ball during that 0.25 s? Give ...
*December 16, 2012 by Ann*

**Physics -Conservation of Momentum-**

1) A 1 kg mass moving at 1 m/s has a totally inelastic collision with a 0.7 kg mass. What is the speed of the resulting combined mass after the collision? 2) A cart of mass 1 kg moving at a speed of 0.5 m/s collides elastically with a cart of mass kg at rest. The speed of the ...
*February 24, 2013 by Isis*

**Physics -Conservation of Momentum-**

1) A 1 kg mass moving at 1 m/s has a totally inelastic collision with a 0.7 kg mass. What is the speed of the resulting combined mass after the collision? 2) A cart of mass 1 kg moving at a speed of 0.5 m/s collides elastically with a cart of mass kg at rest. The speed of the ...
*February 24, 2013 by Isis*

**Physics**

A baseball player hits a line drive. Just before the ball is struck, it is moving east at a speed of 43.2 m/s (97 mi/h). Just after contact with the bat, 9.30 10-4 s later, the ball is moving west at a speed of 52 m/s (116 mi/h). Find the ball's average acceleration. ...
*February 24, 2010 by Delilah*

**Science Physics**

A rubber ball of mass m1= 10kg is moving to the right with speed v1= 10m/s. it collides elastically with another ball of mass m2= 50kg, which is sitting at rest. m2 is larger than m1, what are the speeds of the balls, v1 and v2 after the collision?
*February 3, 2011 by Alan*

**Physics**

A stationary billiard ball, mass 0.17 kg, is struck by an identical ball moving at 2.7 m/s. After the collision, the second ball moves off at 60° to the left of its original direction. The stationary ball moves off at 30° to the right of the moving ball's original direction. ...
*January 20, 2010 by Erica*

**Physics**

A rubber ball is attached to a paddle by a rubber band. The ball is initially moving away from the paddle with a speed of 4.5 m/s. After 0.30 s, the ball is moving toward the paddle with a speed of 2.0 m/s. What is the average acceleration of the ball during that 0.30 s?
*May 21, 2013 by Anonymous*

**Physics**

A ball of mass 5.0 kg moving with speed of 2.0 m/s in the +x-direction hits a wall and bounces back with the same speed in the -x-direction. What is the change of momentum of the ball?
*March 31, 2011 by Natalia*

**Physics**

a 2kg ball is moving rightward at 2m/s when it collides with a 6kg ball that was moving west at a speed of 4m/s. After collision the 2kg ball moves west at a speed of 4m/s. Thw 6kg ball is also moving westward after collision with a speed of 2m/s. Show momentum is conserved. ...
*February 17, 2012 by DK*

**Physics ~really need help!~**

1) A 1 kg mass moving at 1 m/s has a totally inelastic collision with a 0.7 kg mass. What is the speed of the resulting combined mass after the collision? 2) A cart of mass 1 kg moving at a speed of 0.5 m/s collides elastically with a cart of mass kg at rest. The speed of the ...
*February 25, 2013 by Isis*

**Physics Acceleration **

A baseball player hits a line drive. Just before the ball is struck, it is moving east at a speed of 38.8 m/s (87 mi/h). Just after contact with the bat, 1.05 10-3 s later, the ball is moving west at a speed of 46 m/s (103 mi/h). Find the ball's average acceleration.
*May 26, 2013 by Chris*

**physics**

Each croquet ball in a set has a mass of 0.45 kg. The green ball, traveling at 12.6 m/s, strikes the blue ball, which is at rest. Assuming that the balls slide on a friction- less surface and all collisions are head-on, find the final speed of the blue ball in each of the ...
*January 5, 2010 by Anonymous*

**physics**

Billiard ball A of mass m_A = 0.130 kg moving with speed v_A = 2.50 m/s strikes ball B, initially at rest, of mass m_B = 0.145 kg. As a result of the collision, ball A is deflected off at an angle of 31.0 degree, with a speed v_A1 = 2.05 m/s. Write down the equation expressing...
*April 24, 2012 by Caylee*

**Physics **

Problem 3- A 10-g metal ball is moving to the left with a velocity of magnitude 0.4 m/s has a head-on, elastic collision with a larger 30-g metal ball moving to the right with a velocity of magnitude 0.2 m/s. a) Find the speed of the two balls after the collision. b) If the ...
*January 12, 2014 by Mariam*

**physics**

Each croquet ball in a set has a mass of 0.45 kg. The green ball, traveling at 12.6 m/s, strikes the blue ball, which is at rest. Assuming that the balls slide on a friction- less surface and all collisions are head-on, find the final speed of the blue ball in each of the ...
*January 5, 2010 by Anonymous*

**Physics HELPPP PLEASEEE**

A 2.0 kg ball moving with a speed of 3.0 m/s hits, elastically, an identical stationary ball as shown. If the first ball moves away with angle 30° to the original path, determine the speed of the first ball after the collision. the speed and direction of the second ball after ...
*May 27, 2013 by Joeline*

**Physics ~ CONSERVATION OF MOMENTUM~**

1.) A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward? 2.) A 3.0 kg ball at 3 m/s and strikes a 1.5 kg ball moving at -2 m/s. After the ...
*February 18, 2013 by Isis*

**physics**

Figure 8-31 shows a ball with mass m = 1.0 kg attached to the end of a thin rod with length L = 0.56 m and negligible mass. The other end of the rod is pivoted so that the ball can move in a vertical circle. (a) What initial speed must be given the ball so that it reaches the ...
*February 18, 2008 by dawn*

**Physics: urgent help needed**

i have a test on monday 1 A beach ball is thrown straight up with a speed of 10m/s from a point 2 m above the ground a) Assuming no air reistance, calculate how far up the ball will go b)At what speed will the ball eventually hit the ground? c) If the air resistance exerts a ...
*April 9, 2011 by deepti*

**Physics**

A ball with a mass of 0.50 kilograms is moving at a speed of 1.8 meters/second along the positive x-axis. It collides with another ball of the same mass travelling at a speed of 2.0 meters/second toward the positive y-axis. Both balls then start moving together. What is the ...
*March 13, 2013 by fredrick*

**Physics ~ CONSERVATION OF MOMENTUM ~**

1.) A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward? 2.) A 3.0 kg ball at 3 m/s and strikes a 1.5 kg ball moving at -2 m/s. After the ...
*February 19, 2013 by Isis*

**Physics**

1. Will the swinging wonder ever let 2 ball bearings go in and one ball bearing out with twice the v? Why? 2. A 10.0 kg object moving to the right with a speed of 4.0 m/s collides and sticks to a 4.0 kg object moving to the left with a speed of 4.0 m/s. How much energy is lost...
*May 9, 2012 by Anonymous*

**Physics**

1. Will the swinging wonder ever let 2 ball bearings go in and one ball bearing out with twice the v? Why? 2. A 10.0 kg object moving to the right with a speed of 4.0 m/s collides and sticks to a 4.0 kg object moving to the left with a speed of 4.0 m/s. How much energy is lost...
*May 10, 2012 by Anonymous*

**physics**

A 0.70 kg ball is moving horizontally with a speed of 8.8 m/s when it strikes a vertical wall. The ball rebounds with a speed of 3.7 m/s. What is the magnitude of the change in linear momentum of the ball? -I am not sure how to honestly to figure this one out.
*December 2, 2010 by sam*

**physics**

A 0.70 kg ball is moving horizontally with a speed of 8.8 m/s when it strikes a vertical wall. The ball rebounds with a speed of 3.7 m/s. What is the magnitude of the change in linear momentum of the ball? -I am not sure how to honestly to figure this one out.
*December 2, 2010 by sam*

**physics =)**

A 0.200 kg plastic ball moves with a velocity of 0.30 m/s. It collides with a second plastic ball of mass 0.100 kg, which is moving along the same line at a speed of 0.10 m/s. After the collision, both balls continue moving in the same, original direction. The speed of the 0....
*December 25, 2009 by Heart*

**physics**

Ball 2, with a mass of 30kg, is moving to the left at 10m/s. With what velocity should Ball 1, with a mass of 10kg, move to the right and collide with Ball 2, so that Ball 1 rebounds with a velocity of 30m/s, and Ball 2 with a velocity of 10 m/s, after the collision? Assume ...
*February 8, 2012 by Toni*

**physical science**

19. (2 points) Ball 2, with a mass of 30kg, is moving to the left at 10m/s. With what velocity should Ball 1, with a mass of 10kg, move to the right and collide with Ball 2, so that Ball 1 rebounds with a velocity of 30m/s, and Ball 2 with a velocity of 10 m/s, after the ...
*February 13, 2014 by anonymous *

**physics**

an ball of mass initially at rest fragments into two masses each of 1 kg moving with speed 0.6c. find the mass of original body
*September 4, 2013 by gj*

**physics**

a ball of mass 0.1kg makes an elastic head on collision with a ball of unknown mass,initially at rest .if the 0.1kg ball rebounded at one third of its original speed, what is the mass of the other ball?
*September 12, 2011 by gallium*

**ap phyiscs**

A bowler throws a bowling ball of radius R=11 cm down a lane. The ball slides on the lane, with initial speed v(of the center of mass)=7 m/s and initial angular speed =0. The coefficient of kinetic friction between the ball and the lane is .25. The kinectic frictional force fk...
*February 10, 2008 by kristen*

**physics**

A girl of mass 60 kg throws a ball of mass 0.8 kg against a wall. The ball strikes the wall horizontally with a speed of 11 m/s, and it bounces back with this same speed. The ball is in contact with the wall 0.05 s. What is the average force exerted on the wall by the ball? A...
*June 24, 2009 by larry*

**Physics **

A girl of mass 55 kg throws a ball of mass 0.8 kg against a wall. The ball strikes the wall horizontally with a speed of 25 m/s, and it bounces back with the same speed. The ball is in contact with the wall 0.05 s. What is the average force exerted on the wall by the ball? A) ...
*March 30, 2012 by Alex*

**Physics for Life science**

You are on a skateboard of mass 5.00kg with a ball in hands (mass of the ball is 600kg). You throw the ball forward horizontally and find that you recoil back with 2.0m/s. What is the forward speed of the ball? (Use your own mass where needed).
*June 1, 2010 by TangenT*

**Physics**

A 120 g ball moving to the right at 4.2 m/s catches up and collides with a 450 g ball that is moving to the right at 1.2 m/s. If the collision is perfectly elastic, what are the speed and direction of each ball after the collision?
*November 30, 2009 by Zach*

**Physics**

A 0.0600 kg tennis ball, moving with a speed of 2.50 m/s, has a head-on collision with a 0.0900 kg ball initially moving away from it at a speed of 1.00 m/s. Assuming a perfectly elastic collision, what is the speed and direction of each ball after the collision? -I was given ...
*February 3, 2010 by Ashley*

**Physics-check plz**

If a pitcher throws a fast ball with a speed of 35 m/s. The ball has a mass of 220 grams. a) how much work was done in throwing the ball? b) If the catcher catches the ball by moving his mitt 15 cm. backward what force did he exert? a.) Throwing the ball in a positive ...
*June 20, 2014 by Sasha*

**AP physics B**

A billiards cue ball of mass 0.380 kg has a perfectly elastic head-on collision with a standard pool ball. The second pool ball which started at rest travels with a speed which is half the original speed of the cue ball. (a) Calculate the mass of the pool ball. kg (b) ...
*November 2, 2012 by Need help fast*

**physics**

A cue ball initially moving at 2.6 m/s strikes a stationary eight ball of the same size and mass. After the collision, the cue ball’s ﬁnal speed is 1.3 m/s.Find the cue ball’s angle θ with respect to its original line of motion. Consider this to be an elastic ...
*February 9, 2014 by Anonymous*

**Physics**

A tennis ball of mass 57. g bounces off a wall. Right before hitting the wall, the ball is moving to the right and up with vx=+40. m/s and vy=+10. m/s. Right after bouncing off the wall, the ball is moving to the left and up with vx=-35. m/s and vy=+10. m/s. If the ball is in ...
*October 25, 2010 by Gharib*

**physics collision**

A 0.060 kg tennis ball, moving with a speed of 7.00 m/s has a head-on collision with a 0.086 kg ball initially moving in the same direction at a speed of 3.10 m/s. Assume a perfectly elastic collision and take the initial direction of the balls as positive.
*February 24, 2011 by Johnathon*

**Physics**

A tennis ball of mass 57. g bounces off a wall. Right before hitting the wall, the ball is moving to the right and up with vx=+40. m/s and vy=+10. m/s. Right after bouncing off the wall, the ball is moving to the left and up with vx=-35. m/s and vy=+10. m/s. If the ball is in ...
*October 14, 2009 by Nala*

**Physics - Momentum**

A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to one-third its original speed. What is the mass of the second ball?
*December 10, 2009 by DJ*

**Physics**

A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to one-fourth its original speed. What is the mass of the second ball?
*December 10, 2009 by Eric*

**phsyics**

A baseball is thrown straight up. The drag force is proportional to v^2. In terms of g, what is the y-component of the ball's acceleration when its speed is half its terminal speed and it is moving up? In terms of g, what is the y-component of the ball's acceleration when its ...
*September 23, 2010 by jane*

**Physics**

A boy is standing on a skateboard holding two 5.0 kg bowling balls. Initially they are moving to the left at a speed of 3.0 m/s. At one point the boy throws one ball to the right at 4.0 m/s causing his speed to increase. Before he can slow down, he throws the second ball to ...
*November 29, 2012 by Jordan*

**science**

Ball 2 with a mass of 30 kg, is moving left at 10 m/s. At what velocity should ball 1, with a mass of 10 kg, move to the right and collide with 2, so that ball 1 rebounds with a velocity of 10 m/s. assume that the collision is perfectly elastic.
*February 21, 2012 by Milli*

**Physics**

A bowling ball encounters a 0.76 m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly. If the translational speed of the ball is 5.40 m/s at the bottom of the rise, ...
*November 3, 2008 by Kyle*

**Physics- PLEASE HELP**

A 58.0 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with(b) If the ball is in contact with the players head for 19 ms, what is the average acceleration of the ball? a speed of 26.0 m/s. If the player was moving upward with...
*October 17, 2012 by Anonymous*

**Physics- PLEASE HELP**

A 58.0 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with(b) If the ball is in contact with the players head for 19 ms, what is the average acceleration of the ball? a speed of 26.0 m/s. If the player was moving upward with...
*October 17, 2012 by Megan*

**U-Phys**

A 0.060kg tennis ball, moving with a speed of 5.8m/s, has a head-on collision with a 0.10kg ball initially moving in the same direction at a speed of 2.8m/s. Assuming a perfectly elastic collision, determine the speed of each ball after the collision. Determine the direction ...
*October 19, 2009 by Taylor*

Pages: **1** | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>