Thursday

April 24, 2014

April 24, 2014

Number of results: 28,985

**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?
*Monday, September 12, 2011 at 8:05pm by gallium*

**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).
*Tuesday, June 1, 2010 at 6:06am by TangenT*

**physics**

A ball of mass 0.120 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.600 m. What impulse was given to the ball by the floor?
*Monday, July 7, 2008 at 5:14pm by Elisa*

**physics**

A ball of mass 0.120 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.600 m. What impulse was given to the ball by the floor?
*Friday, October 14, 2011 at 5:42pm by Anonymous*

**physics 111**

A ball of mass 0.120 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.600 m. What impulse was given to the ball by the floor? answer in kg·m/s
*Wednesday, October 27, 2010 at 2:00pm by Blake *

**college physics**

A small ball of mass m is aligned above a larger ball of mass M = 0.79 kg (with a slight separation), and the two are dropped simultaneously from height h = 2.0 m. (Assume the radius of each ball is negligible relative to h). (a) If the larger ball rebounds elastically from ...
*Thursday, November 12, 2009 at 9:01pm by Steve*

**Physics Part 1**

Rick is playing billiards and hits the cue ball. It makes contact with the 8 ball head on. If before the collision the cue ball was travelling at 2.4 m/s and after the collision the 8 ball was traveling at 2.13 m/s. How fast and in what direction is the cue ball traveling? (...
*Saturday, November 9, 2013 at 7:27pm by CC*

**physics**

A red ball of mass 0,6 kg,travelling at 5 m.s^-1 on a frictionless surface ,stikes a stationary green ball of mass 0,3 kg.after the collision,the red ball continues to move in its original direction at 2m.s^-1,while the green ball moves in front of the red ball. Determine the ...
*Wednesday, February 5, 2014 at 1:52pm by Mashego clinton*

**science **

jason wants to know the mass of air in his soccer ball. to find the mass he should ? He should add the mass or subtract the mass of an inflated ball or empty ball ?
*Monday, April 26, 2010 at 3:32pm by Ashley*

**physics**

A ball mass 500g rolls at a velocity of 2m/s and hits another ball of mass 250g 1.What is the velocity of a small ball if the bigger ball immediately stops after collision? 2.What is the velocity of the bigger ball if it rolls in the same direction with the smaller ball at 0....
*Saturday, January 21, 2012 at 1:07pm by lufuno nemugumoni*

**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?
*Wednesday, April 11, 2012 at 9:02am by srikala*

**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 ...
*Wednesday, February 8, 2012 at 10:30pm 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 ...
*Thursday, February 13, 2014 at 8:33pm by anonymous *

**kvb**

Sam hits a golf ball with a five-iron a distance of 120 m horizontally. A tree 45 m high and 35 m in front of Sam is directly in the path of the ball. Will the ball clear the tree if the ball makes a parabolic curve and has maximum height of 80 m?
*Tuesday, October 11, 2011 at 7:56am by veera*

**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 ...
*Monday, January 28, 2013 at 12:45pm by Jessica*

**Physics**

A cue ball (mass = 0.150 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.45 N·s to the ball. The ball then slides along the table and makes an elastic head-on collision with a second ball of equal mass ...
*Sunday, October 24, 2010 at 4:48pm by Xavier*

**physics**

A cue ball (mass = 0.140 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.60 N·s to the ball. The ball then slides along the table and makes an elastic head-on collision with a second ball of equal mass ...
*Wednesday, December 7, 2011 at 7:03pm by s*

**physics**

A cue ball (mass = 0.140 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.60 N·s to the ball. The ball then slides along the table and makes an elastic head-on collision with a second ball of equal mass ...
*Wednesday, December 7, 2011 at 8:34pm by Anonymous*

**Physics**

A ball of mass oscillates on a spring with spring constant = 200 . The ball's position is described by (0.350 ) 16.0 with measured in seconds. -What is the amplitude of the ball's motion? -What is the frequency of the ball's motion? -What is the value of the mass ? - Ronald ...
*Wednesday, April 28, 2010 at 9:39am by R*

**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 ...
*Wednesday, November 7, 2007 at 1:11pm by Jessica*

**pysics**

a .15 kg ball is placed in a shallow wedge with an opening angle of 120 degrees. for each contatct point between the wedge and the ball, determine the force exerted on the ball. assume the system is frictionless.
*Wednesday, November 3, 2010 at 6:20pm by stephanie*

**physics **

ball 1 has a mass of 5kg and a ball 2 has a mass of 10kg they both are dropped off a 20m tower. the force of gravity on the first ball is F1 and the force of gravity on the second ball is F2 what is the ratio of F1 to F2
*Saturday, November 24, 2012 at 10:02pm by yocelyne t*

**physics**

A tennis ball of mass 0.057 kg is served. It strikes the ground with a velocity of 54 m/s (120 mph) at an angle of 21° below the horizontal. Just after the bounce it is moving at 51 m/s at an angle of 19° above the horizontal. If the interaction with the ground lasts 0.064 s, ...
*Tuesday, August 2, 2011 at 2:37pm by Ashley*

**physics**

A ball of mass 0.075 kg is fired horizontally into a ballistic pendulum. The pendulum mass is 0.350 kg. The ball is caught in the pendulum, and the centerof mass of the system rises a vertical distance of 0.145 m in the earth's gravitational field. What was the original speed ...
*Sunday, March 28, 2010 at 9:01pm by april*

**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...
*Wednesday, December 9, 2009 at 6:21pm by Shane*

**physics**

A force of 30 N pulls a mass left at 30 degrees to the horizontal and one of 100 N pulls right at 120 degrees. If the mass of the mass which is 50 kg, find the acceletation if coeffcient of sliding is .01? What would be the equation of this problem? If you are talking about a ...
*Monday, November 20, 2006 at 3:58pm by randy*

**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 ...
*Monday, February 18, 2008 at 11:30am by dawn*

**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) ...
*Friday, November 2, 2012 at 5:54pm by Need help fast*

**Physics - Center of Mass**

A baseball player uses a bat with mass mbat to hit a ball with mass mball. Right before he hits the ball, the bat's initial velocity is 36 m/s, and the ball's initial velocity is -20 m/s (the positive direction is along the positive x-axis). The bat and ball undergo a one-...
*Saturday, June 16, 2012 at 7:44pm by Ray*

**physics**

A ball of mass 0.075 kg is fired horizontally into a ballistic pendulum. The pendulum mass is 0.350 kg. The ball is caught in the pendulum, and the centerof mass of the system rises a vertical distance of 0.145 m in the earth's gravitational field. What was the original speed ...
*Sunday, March 28, 2010 at 9:03pm by sara*

**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.
*Tuesday, February 21, 2012 at 11:12am by Milli*

**6th grade**

A hole is punched in a kickball. Most of the air escapes and the ball collapses and shrinks. What happens to the ball? A. The volume of the ball decreases. B. The mass of the ball does not change.
*Wednesday, November 19, 2008 at 6:18pm by Britty*

**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...
*Wednesday, June 24, 2009 at 11:23pm 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) ...
*Friday, March 30, 2012 at 10:07pm by Alex*

**Physics**

In the figure, two balls are located in deep space. The black ball has mass 56kg and the red ball has mass 17kg. The distance between the two balls is r=24cm. (a) Find the magnitude of the acceleration of the red ball. m/s2 (b) If r is 5 times larger, with what factor will the...
*Thursday, March 8, 2012 at 9:13pm by Sarah*

**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 ...
*Sunday, January 10, 2010 at 5:00pm 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 ...
*Thursday, December 10, 2009 at 6:04pm by Anonymous*

**Physics**

A 0.421-kg ball has an elastic, head-on collision with a second ball that is initially at rest. The second ball moves off with half the original speed of the first ball. (a) What is the mass of the second ball? (b) What fraction of the original kinetic energy (ΔK/K) is ...
*Wednesday, June 6, 2012 at 9:04am by James*

**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?
*Wednesday, March 21, 2012 at 3:53pm by Becky*

**physics**

A 156 gram 8 ball rolls across a pool table at 2 m/s when it collides with a 7 ball of equal mass rolling in the opposite direction at 1.5 m/s. The 8 ball bounces backwards at 1 m/s. Find the momentum of the 7 ball.
*Tuesday, June 12, 2012 at 5:00pm by someone*

**Physics**

A 0.100 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. (a).what is the mass of the second ball? (b).What fraction of the original kinetic energy (ΔKE/KE) ...
*Sunday, January 2, 2011 at 8:34am by John *

**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, ...
*Monday, November 3, 2008 at 9:32am by Kyle*

**science**

A small ball with a mass of 30.0 g and a charge of −0.200 μC is suspended from the ceiling by a string. The ball hangs at a distance of 5.00 cm above an insulating floor. If a second small ball with a mass of 50.0 g and a charge of 0.400 μC is rolled directly ...
*Monday, September 17, 2012 at 1:39pm by alia*

**physics**

A small ball with a mass of 30.0 g and a charge of −0.200 μC is suspended from the ceiling by a string. The ball hangs at a distance of 5.00 cm above an insulating floor. If a second small ball with a mass of 50.0 g and a charge of 0.400 μC is rolled directly ...
*Monday, September 17, 2012 at 2:32pm by alia*

**Physics**

It takes 2.5 s for a small ball released from rest from a tall building to reach the ground. The mass of the ball is 0.05 kg. Calculate the height from which the ball is released. Ok so I have the time, initial velocity, and the acceleration. But the mass totally throws me off...
*Tuesday, October 9, 2007 at 1:07pm by Lindsay*

**physics please help**

A golfer, driving a golf ball off the tee, gives the ball a velocity of +40 m/s. The mass of the ball is 0.045 kg, and the duration of the impact with the golf club is 4.05E-3s. (a) What is the change in momentum of the ball? (b) Determine the average force applied to the ball...
*Friday, November 5, 2010 at 9:21am by jonathan*

**Physics**

A 0.280 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. (a) What is the mass of the second ball? (b) What fraction of the original kinetic energy (ΔKE/KE) ...
*Wednesday, November 11, 2009 at 2:12pm by Ashley*

**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, ...
*Friday, October 11, 2013 at 12:06am by Alison*

**physics please help :)**

a.the gravitational force between 2 electrons 1.00m apart is 5.42x10^-71 N. Find the mass of an electron. b.2 spherical balls are placed so their centres are 2.6m apart. The force between the balls is 2.75x10^-12N. What is the mass of each ball if one ball is twice the mass of...
*Tuesday, December 8, 2009 at 11:57pm 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 ...
*Thursday, April 14, 2011 at 9:32pm by shahzi*

**physics**

A basketball of mass 0.602 kg is passed to a player of mass 83.0 kg who jumps off the floor while catching the ball. The player's center of mass is instantaneously at rest just before he catches the ball, which is initially moving at a velocity of 11.5 m/s, directed 30.0° ...
*Thursday, November 29, 2012 at 10:32pm by Anthony*

**physics**

Ball 1, with a mass of 180 g and traveling at 18 m/s, collides head on with ball 2, which has a mass of 370 g and is initially at rest (a) What are the final velocities of each ball if the collision is perfectly elastic? (b) What are the final velocities of each ball if the ...
*Tuesday, October 26, 2010 at 8:33pm by Lucy*

**physics**

A ball has a mass of 0.14 kg and is pitched w/ velocity of 38 m/s. The batter hits the ball & departs w/ a velocity of 58 m/s. Contact time b/w the bat and ball is 4.0 x 10-3seconds. What is avg force exerted on ball?
*Saturday, December 11, 2010 at 12:45pm by jennifer*

**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?
*Thursday, December 10, 2009 at 6:04pm 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?
*Thursday, December 10, 2009 at 6:22pm by Eric*

**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?
*Monday, November 30, 2009 at 2:14pm by Zach*

**Physics**

A woman, driving a golf ball off a tee, gives the ball a velocity of 28.0 m/s. The mass of the ball is 0.045 kg, and the duration of the impact with the golf club is 6 x 10-3 s. 3a. What is the change in momentum of the ball
*Tuesday, April 13, 2010 at 8:37am by Arnold Manguy*

**physic**

Two spherical balls are placed so their centers are 2.6 m apart. The force between the two balls is 2.75 x 10-12 N. What is the mass of each ball if one ball is twice the mass of the other ball?
*Monday, January 18, 2010 at 11:02am by susan *

**Physics**

Adventurous Mary tries a new game: she puts on her rollerblades and throws the ball towards the wall, lets it bounce off, catches it again, throws it right back, and so on. She notices a strange thing: after the second throw, she is unable to catch the ball anymore since the ...
*Monday, June 17, 2013 at 12:29am by Abhishek Ranjan*

**physics**

Adventurous Mary tries a new game: she puts on her rollerblades and throws the ball towards the wall, lets it bounce off, catches it again, throws it right back, and so on. She notices a strange thing: after the second throw, she is unable to catch the ball anymore since the ...
*Monday, June 17, 2013 at 6:25am by Anonymous*

**physics**

Adventurous Mary tries a new game: she puts on her rollerblades and throws the ball towards the wall, lets it bounce off, catches it again, throws it right back, and so on. She notices a strange thing: after the second throw, she is unable to catch the ball anymore since the ...
*Tuesday, June 18, 2013 at 1:55am by jack *

**PHYSICS**

Two balls collide on a horizontal, frictionless table. Ball A has a mass of 0.175 kg and travelling at 1.20 m/s [E 40o S]. Ball B has a mass of 0.225 kg and is travelling at 0.68 m/s [E]. The velocity of ball B after collision is 0.93 m/s [E 23o S]. What is the velocity of ...
*Thursday, May 10, 2012 at 8:11pm by myra*

**Physics**

12th grade physics ap question. A baseball with a mass of 120 g is hit 21.8 m into the air. The ball is caught by the third baseman 2.5 m above the ground. What potential energy did the ball develop at its highest point? How much potential energy did it still have when it was ...
*Wednesday, October 24, 2012 at 7:38pm by Ravin*

**physics**

at a ball game consider a baseball of mass m=0.15 that falls directly downward at a speed v=40m/s into the hands of a fan. what impulseft must be supplied to bring the ball to rest? if the ball is stopped in 0.3s, what is the average force of the ball on the catchers hand?
*Thursday, October 15, 2009 at 7:52pm by saba*

**physics**

at a ball game consider a baseball of mass m=0.15 that falls directly downward at a speed v=40m/s into the hands of a fan. what impulseft must be supplied to bring the ball to rest? if the ball is stopped in 0.3s, what is the average force of the ball on the catchers hand?
*Thursday, October 15, 2009 at 7:55pm by Anonymous*

**physics**

at a ball game consider a baseball of mass m=0.15 that falls directly downward at a speed v=40m/s into the hands of a fan. what impulseft must be supplied to bring the ball to rest? if the ball is stopped in 0.3s, what is the average force of the ball on the catchers hand?
*Thursday, October 15, 2009 at 7:57pm by saba*

**math**

I am doing something wrong when I work this question. Can someone show me the steps. I have the answer. x<5.189 The sum of the costs in parts a and c is less than $120. Write and solve an inequality to determine the possiblities for the number of compact disks Merle ...
*Saturday, April 14, 2007 at 8:50pm by priscilla*

**PHYSICS!!!! help!!!**

A perfectly spherical, but squishable ball of radius 10 cm is blown up to an internal pressure of 2 atm. The ball is placed between two perfectly vertical walls and the walls are slowly squeezed together. Initially the ball slips down the walls, but when the walls are 18 cm ...
*Sunday, April 28, 2013 at 4:35am by your hero....*

**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 ...
*Tuesday, January 5, 2010 at 7:41pm by Anonymous*

**Physics. LAST PROBLEM!!**

A small metal ball with a mass of m = 82.5 g is attached to a string of length l = 1.72 m. It is held at an angle of θ = 58.5° with respect to the vertical. The ball is then released. When the rope is vertical, the ball collides head-on and perfectly elastically with an ...
*Tuesday, March 26, 2013 at 6:29pm by Elena*

**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 ...
*Thursday, December 20, 2012 at 10:24pm by Shawn*

**Physics**

Two balls, one of gold with a mass of 100 kg and one of wood with a mass of 1 kg, are suspended 1 meter apart. What is the attractive force, in newtons, of a. the gold ball acting on the wooden ball? b. the wooden ball acting on the gold ball?
*Thursday, September 12, 2013 at 2:28pm by vv*

**Physics**

Two balls, one of gold with a mass of 100 kg and one of wood with a mass of 1 kg, are suspended 1 meter apart. What is the attractive force, in newtons, of a. the gold ball acting on the wooden ball? b. the wooden ball acting on the gold ball?
*Tuesday, September 17, 2013 at 7:01am by vv*

**Physics**

The centers of a 14 kg lead ball and a 120 g lead ball are separated by 9.0cm .What gravitational force does each exert on the other?
*Monday, March 22, 2010 at 3:44pm by Nicole*

**physics**

A tennis player smashes a serve so that the racquet is in contact with the ball for 0.055 s, giving it an impulse of 2.5 N ⋅ s. What average force was applied during this time? Assume that the vertical motion of the ball can be ignored. If the ball's mass is 0.060 kg, ...
*Wednesday, May 9, 2012 at 8:12pm by dreamygirl*

**Physics**

A rubber ball weighs 95 N a. what is the mass of the ball ? b.what is the acceleration of the ball if an upward force of 69N is applied
*Sunday, November 29, 2009 at 2:12am by Anonymous*

**Physics**

A wooden block and a lead ball are connected by a light string that passes over a frictionless pulley. The block has a mass of 6kg and the ball has a mass of 2kg. after they are released from rest, the block will slide along the wooden ramp. a.) which direction will the block ...
*Sunday, October 17, 2010 at 8:04pm by Sadie*

**physics**

during a circus act, an elderly performer thrills the crowd by catching a cannon ball shot at him the ball mass is 10.0 kg and ball velocity is 8 m/s while the performer mass is 65 kg. if the performer is on nearly friction-less roller skates, what is his recoil velocity.
*Sunday, March 23, 2014 at 11:35pm by Mohanad*

**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...
*Wednesday, February 25, 2009 at 8:07pm by nikki*

**Gen physics**

Two balls are approaching each other head-on. Their velocities are +11.9 and -10.5 m/s. Determine the velocity of the center of mass of the two balls if (a) they have the same mass and (b) if the mass of one ball (v = 11.9 m/s) is twice the mass of the other ball (v = -10.5 m/...
*Monday, July 22, 2013 at 5:52pm by ODU*

**physics**

Two balls are approaching each other head-on. Their velocities are +11.9 and -10.5 m/s. Determine the velocity of the center of mass of the two balls if (a) they have the same mass and (b) if the mass of one ball (v = 11.9 m/s) is twice the mass of the other ball (v = -10.5 m...
*Thursday, July 25, 2013 at 6:35pm by tcc*

**physics**

If the mass of ball A is 5kg and ball B is 75kg, how high should ball B be dropped from so that when B collides with A they stick together and travel to point X?
*Thursday, January 19, 2012 at 11:46am by Andy*

**Physics **

A billiard ball with mass 0.210 kg has a speed of 5.2 m/s and collides completely inelastically with another ball of the same size and mass. I understood the first part of the problem I just need help solving the second part. Another billiard ball traveling at 6.25 m/s ...
*Thursday, November 14, 2013 at 6:24pm by Leslie*

**physics**

Consider a ball of mass m1 moving with a velocity u1 collides elastically with a ball of mass m2 at rest.Show that the maximum energy transfer takes place when m1=m2.
*Friday, September 2, 2011 at 9:34am by Nantu*

**physics**

two balls collide in a head on elastic collision and rebound in opposite directions. One ball has velocity 1.2 before the collision and -2.3 after. the other ball has a mass of 1.1 kg and a velocity of -4.2 before the collision. What is the mass of the first ball? What is the ...
*Thursday, January 6, 2011 at 10:21pm by jay*

**Physics**

Jen drops a ball with a mass of 0.100 kg from a height of 20.0 m The initial downward velocity of the ball is 5.00 m/s. What is the kinetic energy of the ball after it has fallen 10.0 m?
*Thursday, September 13, 2012 at 1:41pm by Anonymous*

**physics**

a ball is dropped from a tower of height 5 m. it accelerates uniformly at 10m/s .if mass of the ball is 2 kg ,find the momentum transferred by a ball to the ground on striking.
*Wednesday, October 9, 2013 at 1:58am by TINA*

**physics**

A heavy ball A of mass 10kg is moving at a velocity of 10m/s to the right. When it hits a stationary ball B of mass 5kg, ball B moves at a velocity of 10m/s to the right. a) explain whether it is inelastic collision or not.
*Saturday, November 20, 2010 at 7:46am by Anonymous*

**Physics**

A ball of mass m(1) = 0.250 kg and initial v(1) = 5.00 m/s collides head-on with a ball of mass m(2) = 0.800 kg that is initially at rest. What are the velocities of the balls after the collision if they stick together?
*Friday, January 11, 2013 at 3:49pm by Jackie*

**Physics**

Two balls are connected by a string that stretches over a massless, frictionless pulley. Ball 1 has a mass of 0.45 kg and is held 0.74 m above the ground. Ball 2 has a mass of 5.7 kg and is held 0.88 m above the ground. When the balls are released, ball 2 falls to the ground, ...
*Sunday, December 21, 2008 at 3:05am by jason*

**physic**

Two balls are conneted by a string that stretches over a massless, frictionless pulley. Ball 1 has a mass of 0.81 kg and is held 0.5 m above the ground. Ball 2 has a mass of 6.3 kg and is held 0.28 m above the ground. When the balls are released, ball 2 falls to the ground, ...
*Sunday, January 15, 2012 at 12:29am by Anonymous*

**anna**

There is a right triangle. the legs are x and y and the hypotenuse is 120. the angle opposite x is 58. please check my answer. x= 120 y=64 because: SIN58= x/120 COS58=y/120
*Tuesday, March 11, 2008 at 7:03pm by Geometry*

**physics impulse**

a baseball has a mass of 0.145kg. the ball is crossing the plate horizontally at 40 m/s when the batter hits the ball. The final velocity of the ball is 50 m/s stright up. what is the impulse that the batter gives the ball?
*Sunday, December 12, 2010 at 11:29pm by Anonymous*

**physics**

Ball 1, with a mass of 100g and traveling at 12 m/s , collides head on with ball 2, which has a mass of 340g and is initially at rest. What are the final velocities of each ball if the collision is perfectly elastic? What are the final velocities of each ball if the collision ...
*Sunday, October 18, 2009 at 2:14pm by Dan*

**physics**

A ball weighing 1.78 N is shot through a launcher, achieving a speed ( from rest) of 41 m/s in 0.28 s. A) What is the mass of the ball? B) What is the acceleration of the ball as it moves through the launcher? C) What average force acted on the ball to make it accelerate?
*Saturday, November 19, 2011 at 6:08pm by mack*

**physics**

A ball of mass Ml = 0.250 kg and velocity V01 = +5.00 m/s (see Figure) collides head-on with a ball of mass M2 = 0.800 kg that is initially at rest. No external forces act on the balls. a) What was the kinetic energy of the first ball before the collision; b) If the collision ...
*Saturday, May 21, 2011 at 5:02pm by Fabiana*

**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...
*Sunday, February 10, 2008 at 8:57pm by kristen*

**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
*Thursday, May 2, 2013 at 11:38pm by Kathy*

**Physics please help. **

A ball of Styrofoam (ρ = 100 kg/m3) is totally submerged in water. The ball has a mass of 300.0 g (it could be a pretty big block). What is the volume of the ball? If a string holds the ball when it’s in the water, what’s the tension in the string?
*Wednesday, January 15, 2014 at 1:29am by unknown*

**physics**

Two balls are approaching each other head-on. Their velocities are +9.30 and -12.1 m/s. Determine the velocity of the center of mass of the two balls for the following conditions. (Use the sign of your answer to indicate the direction.) (a) They have same mass. m/s (b) The ...
*Wednesday, November 9, 2011 at 11:48pm by Taylor*

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