Thursday

July 31, 2014

July 31, 2014

Number of results: 36,715

**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?
*July 7, 2008 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?
*October 14, 2011 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
*October 27, 2010 by Blake *

**physics**

A ball of mass m=0.25 kg is dropped from rest. What is the speed of the ball after it falls two meters?
*April 22, 2014 by Elle*

**physics**

a ball has a mass of 0.5kg dropped from a cliff top, the ball srtikes the sea below at a velocity of 10m/s. (a)what is the kinetic energy of the ball as it strikes the sea? (b) what was its potential energy before it was dropped? (c)from what height was it dropped?
*December 9, 2011 by sim*

**Physics**

A 0.135 kg ball is dropped from rest. If the magnitude of the ball's momentum is 0.730 kg·m/s just before it lands on the ground, from what height was it dropped?
*April 22, 2010 by Physics*

**Physics**

A 0.135 kg ball is dropped from rest. If the magnitude of the ball's momentum is 0.730 kg·m/s just before it lands on the ground, from what height was it dropped?
*April 22, 2010 by Physics*

**physics**

1. A centrifuge in a medical laboratory rotates at an angular speed of 3650 rev/min. When switched off, it rotates through 50.0 revolutions before coming to rest. Find the constant angular acceleration of the centrifuge. 2. A ball of mass 0.120 kg is dropped from rest from a ...
*July 6, 2008 by Elisa*

**math**

A ball rebounds to one quarter from which it was dropped. approximate the total vertical distance the ball after being dropped from 3ft above the ground ,until it comes to rest
*April 15, 2014 by anna*

**math**

how do i work out the following word problem. a particular ball retains half of its heght on each bounce when dropped from a height of 80 m. give the height of the ball on the fifth bounce after being dropped?(will the ball comes to rest?)
*May 19, 2012 by ladane*

**Physics**

A ball, dropped from rest, cover 2/7 of the distant to the ground in the last 2 seconds of its fall. From what height was the ball dropped? What was the total time of the fall?
*October 11, 2009 by Robert C*

**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 ...
*October 24, 2010 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 ...
*December 7, 2011 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 ...
*December 7, 2011 by Anonymous*

**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 ...
*November 12, 2009 by Steve*

**math**

A steel ball is dropped from rest from the roof of a building. An observer standing behind a window that is part way down the building 120 cm high notes the ball takes 0.125 s to fall from the top to the bottom of the window. The ball continues to fall, makes an elastic ...
*September 8, 2012 by A*

**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
*November 24, 2012 by yocelyne t*

**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*

**Math**

This chart shows how high a ball bounces when dropped from different heights If this ball is dropped from 350 in how high will it bounce? Drop in inches Bounce Height 50 25 100 50 150 75 200 100 A.200 B.175 C.150 D.120 B?
*February 7, 2013 by Jerald*

**physics**

A ball is dropped from rest off a 27 m building.What is the maximum speed that the ball will reach?
*September 24, 2012 by Brayden*

**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?
*January 19, 2012 by Andy*

**physics**

two balls are dropped to the ground from different heights. one ball is dropped 2s after the other but they both strike the ground at the same time, 5s after the first is dropped. what is the difference in height from which they are dropped? from what height was the first ball...
*June 14, 2011 by pavatharani*

**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.
*October 9, 2013 by TINA*

**math**

the height that a ball bounces varies directly as the height from which it is dropped. A ball dropped from a height of 20cm bounces 16cm a) Find the height of the bounce if the ball is dropped from a height of 280cm b) Find from waht height the ball was dropped if it bounces ...
*January 13, 2009 by lisa*

**Physics**

A 5.80 kg ball is dropped from a height of 14.5 m above one end of a uniform bar that pivots at its center. The bar has mass 9.00 kg and is 6.40 m in length. At the other end of the bar sits another 5.30 kg ball, unattached to the bar. The dropped ball sticks to the bar after ...
*April 5, 2012 by Joe*

**Physics**

A dropping ball initial at rest is dropped 1.5m; calculate a) the traveling time of the ball and b) its velocity just before reaching the ground.
*February 10, 2013 by John*

**physics**

1) a force of 10 N acts on a 5.0 kg object, initially at rest, for 2.5 s. What is the final speed of the object? 2) a 1500 kh car, is allowed to coast along a level track at a speed of 8.0 m/s. It collides and couples with a 2000-kg truck , initially at rest with brakes ...
*November 29, 2010 by Joceylin*

**Physics**

A 0.400-kg ball is dropped from rest at a point 1.80 m above the floor. The ball rebounds straight upward to a height of 0.730 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor?
*October 14, 2010 by Sarah*

**physics**

A ball bearing is dropped from rest at a point A. At the instant it passes a mark 4.5 m below A, another ball bearing is released from rest from a position 5.5 m below A. 1) At what time after its release will the second ball bearing be overtaken by the first? 2) How far does ...
*June 7, 2011 by tank*

**Physics**

Two balls are dropped from rest from the same height. One of the balls is dropped 1.0 s after the other. What distance separates the two balls 2.00 s after the second ball is dropped?
*August 28, 2011 by Anonymous*

**Physics**

A 0.350-kg ball is dropped from rest at a point 1.10 m above the floor. The ball rebounds straight upward to a height of 0.420 m. Taking the negative direction to be downward, what is the impulse of the net force applied to the ball during the collision with the floor?
*January 3, 2012 by Robert*

**math**

Two identical rubber balls are dropped from different heights. Ball 1 is dropped from a height of 156 feet, and ball 2 is dropped from a height of 202 feet. Write a function for the height of each ball. h1(t)=159+t h2(t)=202+t
*July 12, 2014 by pmh*

**Physics**

A ball is dropped from rest from a height of 20.0 m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?
*August 28, 2011 by Anonymous*

**Physics**

A ball is dropped from rest from a height of 20.0m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?
*August 31, 2012 by Alex*

**Physics**

A ball is dropped from rest from a height of 20.0m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?
*August 31, 2012 by Alex*

**algebra1 HELP PLEASE**

Two identical rubber balls are dropped from different heights. Ball 1 is dropped from a height of 100 feet, and ball 2 is dropped from a height of 210 feet. Write a function for the height of each ball. h1(t) = h2(t) = When does ball 1 reach the ground? Round to the nearest ...
*July 8, 2013 by lisa*

**PHYSICS**

1....How much force needed to bring a 3200 lb car from rest to a velocity of 44 m/s in 8 sec.? 2....A ball with a mass of 2 kg move to the right with a speed of 2 m/s. It hits a ball of mass 0.50 kg which is at rest. After collision the second ball moves to the right with a ...
*February 18, 2011 by EM*

**AP Physics**

a ball of mass 3 kg is moving with a velocity of 10 m/s. This ball collides with a second ball of mass 0.5 kg that is at rest. After the collison, the first ball is at rest. What is the velocity after the collison of the second ball if the collison is inelastic?
*October 18, 2011 by Kailyn*

**AP Physics**

a ball of mass 3 kg is moving with a velocity of 10 m/s. This ball collides with a second ball of mass 0.5 kg that is at rest. After the collison, the first ball is at rest. What is the velocity after the collison of the second ball if the collison is inelastic?
*October 18, 2011 by Kailyn*

**math**

when a ball is dropped, it bounces back up 4/5 of the height from the height it was dropped.If the ball dropped from a height of 200cm, how high does it go after bouncing twice.
*February 9, 2013 by leanna*

**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**

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*

**physic PLEASE I REALLY NEED HELP WITH THIS PROBLEM**

Two identical rubber balls are dropped from different heights. Ball 1 is dropped from a height of 100 feet, and ball 2 is dropped from a height of 210 feet. Write a function for the height of each ball. h1(t) = h2(t) = When does ball 1 reach the ground? Round to the nearest ...
*July 8, 2013 by lisa*

**algeba 1 please I REALY NEED HELP THANK YOU :D**

Two identical rubber balls are dropped from different heights. Ball 1 is dropped from a height of 100 feet, and ball 2 is dropped from a height of 210 feet. Write a function for the height of each ball. h1(t) = h2(t) = When does ball 1 reach the ground? Round to the nearest ...
*July 8, 2013 by lisa*

**physics**

an elastic ball rebounces 70% when it is dropped from the height. if it is dropped from 60m what is the total distance travelled by the ball
*May 26, 2012 by Anonymous*

**Physics**

A ball initially at rest is dropped from a window 18.6 m off the ground. How long does it take for the ball to reach the ground? Round your answer to 2 decimal places.
*November 21, 2010 by Patel*

**algebra1 HELP PLEASE Thanks you!!**

Two identical rubber balls are dropped from different heights. Ball 1 is dropped from a height of 100 feet, and ball 2 is dropped from a height of 210 feet. Write a function for the height of each ball. h1(t) = h2(t) = When does ball 1 reach the ground? Round to the nearest ...
*July 8, 2013 by sandy *

**Physics**

A ball is thrown straight up from the ground with speed . At the same instant, a second ball is dropped from rest from a height , directly above the point where the first ball was thrown upward. There is no air resistance. Question- Find the value of in terms of and so that at...
*May 28, 2010 by Anonymous*

**physics**

A rubber ball (mass 0.21 kg) is dropped from a height of 1.7 m onto the floor. Just after bouncing from the floor, the ball has a speed of 3.6 m/s. (a) What is the magnitude and direction of the impulse imparted by the floor to the ball? Magnitude? Direction? (b) If the ...
*December 4, 2011 by glenmore*

**momemtum ?**

A ball of mass 0.150 kg is dropped from rest to a height of 0.125 m. It rebounds from the floor to reach a height of 0.960m. What impulse was given by the floor? please help/explain. Thanks!
*June 16, 2010 by jake*

**algebra1 HELP PLEASE Thanks you!!**

wo identical rubber balls are dropped from different heights. Ball 1 is dropped from a height of 100 feet, and ball 2 is dropped from a height of 210 feet. Write a function for the height of each ball. h1(t) = h2(t) = When does ball 1 reach the ground? Round to the nearest ...
*July 8, 2013 by lisa*

**physics**

A rubber ball of mass 18.0 g is dropped from a height of 1.75 m onto a floor. The velocity of the ball is reversed by the collision with the floor, and the ball rebounds to a height of 1.55 m. What impulse was applied to the ball during the collision?
*October 16, 2011 by Kellie*

**physics**

A rubber ball of mass 19.5 g is dropped from a height of 1.85 m onto a floor. The velocity of the ball is reversed by the collision with the floor, and the ball rebounds to a height of 1.55 m. What impulse was applied to the ball during the collision?
*February 24, 2012 by Tyler*

**Physics**

A rubber ball of mass 41.5 g is dropped from a height of 1.75 m onto a floor. The velocity of the ball is reversed by the collision with the floor, and the ball rebounds to a height of 1.55 m. What impulse was applied to the ball during the collision?
*February 24, 2012 by Anonymous*

**physics**

A rubber ball of mass 43.5 g is dropped from a height of 2.05 m onto a floor. The velocity of the ball is reversed by the collision with the floor, and the ball rebounds to a height of 1.55 m. What impulse was applied to the ball during the collision?
*October 14, 2013 by Anonymous*

**Physics**

A ball of mass 0.15kg is dropped from rest at a height of 1.25m. it rebounds from the floor to reach a height of 0.960n. what impulse is given to the ball from the floor? i dont have a clue where to start. i know impulse is constant force x change in time or time elapsed, but ...
*October 21, 2007 by natali*

**physics**

A superball is dropped from rest from a height of 2.0m. It bounces repeatedly from the floor, as superballs are prone to do. After each bounce the ball dissipates some energy, so eventually it comes to rest. The following pattern is observed: After the 1st bounce, the ball ...
*January 31, 2014 by Chey*

**physics**

A superball is dropped from rest from a height of 2.0m. It bounces repeatedly from the floor, as superballs are prone to do. After each bounce the ball dissipates some energy, so eventually it comes to rest. The following pattern is observed: After the 1st bounce, the ball ...
*January 31, 2014 by Cheylynne*

**physics**

A ball is thrown upward from the ground with an initial speed of 26.2 m/s; at the same instant a ball is dropped from rest from a building 14 m high. After how long will the balls be at the same height?
*September 19, 2010 by Katie*

**Physics**

A ball is thrown upward from the ground with an initial speed of 25 m/s; at the same instant, a ball is dropped from rest from a building 15 m high. After how long will the balls be at the same height?
*September 20, 2012 by Shayla*

**physics**

A ball is thrown upward from the ground with an initial speed of 25 m/s; at the same instant, a ball is dropped from rest from a building 15 m high. After how long will the balls be at the same height?
*September 20, 2012 by Shayla*

**Science**

A ball is thrown from a cliff at a horizontal speed of 3m/second and at the same time a second ball is dropped straight down from the cliff. How fast will the dropped ball be going after 2 seconds?
*October 26, 2009 by Steve Felton*

**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 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 ...
*June 6, 2012 by James*

**math**

a ball rebounds one half of the height from which it was dropped. The ball is dropped from a height of 160 feet and keeps bouncing. what is the total vertical distance the ball will travel from the moment it is droppedto the moment it hits the floor for the fifth time?
*July 9, 2009 by laly*

**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*

**uniben**

A rubber ball is dropped from a height of 10meters,suppose it rebounds one-half the distance after each fall.find the total distance the ball travels before coming to rest.
*April 29, 2012 by wilfred*

**Physics**

A rubber ball, with a mass of 40.0 grams is dropped from rest from a height of 1.60 m above the floor. It hits the floor, and then reaches a maximum height of 90.0 cm when it comes back up again. In this problem, use g = 10.0 m/s2. a) The collision with the floor causes some ...
*October 27, 2013 by Yasmina*

**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...
*October 9, 2007 by Lindsay*

**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) ...
*January 2, 2011 by John *

**Physics**

A ball is thrown straight up from the ground with speed v_0. At the same instant, a second ball is dropped from rest from a height H, directly above the point where the first ball was thrown upward. There is no air resistance. Find the value of H in terms of v_0 and g so that ...
*May 28, 2010 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?
*October 15, 2009 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?
*October 15, 2009 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?
*October 15, 2009 by saba*

**physics**

A ball dropped from a sixth floor window accelerates at 10 m/s^2 After 2 seconds it hits the ground. It bounces back with a velocity of −15 m/s 1.find the height from which the ball was dropped. 2. How high did it bounce?
*September 26, 2013 by Anonymous*

**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.
*September 2, 2011 by Nantu*

**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*

**Math**

A ball is dropped from a height of 36 feet. The quadratic equation d=1/2 gt^2 is used to calculate the distance (d) the ball has fallen after t seconds. The constant g is the acceleration of gravity, 9.8m/s^2. How long does it take the ball to hit the ground? A ball in problem...
*November 19, 2012 by Lux*

**physics**

A shot put ball with mass 5kg is dropped from a height of 1,75m. Ignore air resistance. Calculate the time it takes for the ball to reach the ground
*February 11, 2014 by nay_dean*

**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*

**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**

A ball is thrown upward from the ground with an initial speed of 21.5 m/s; at the same instant, a ball is dropped from rest from a building 17 m high. After how long will the balls be at the same height? The acceleration of gravity is 9.81 m/s2. Answer in units of s.
*October 5, 2010 by Anonymous*

**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 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?
*January 11, 2013 by Jackie*

**HS Physics**

Please help...I know the direction is up, but I can't figure out the magnitude, except that its label is kg · m/s, I think. A 0.400-kg ball is dropped from rest at a point 1.80 m above the floor. The ball rebounds straight upward to a height of 0.730 m. What are the magnitude ...
*October 15, 2010 by Tzana*

**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) ...
*November 11, 2009 by Ashley*

**physics**

A spherical mass 'm'is dropped vertically off a building starting from rest and 'y=0'.the mass experience a resistive force 'FR=-bv'.let 'r=b/m'.find the position'y(t)'of mass???
*April 26, 2012 by M.sani*

**PHYSICS**

Long, long ago, on a planet far, far away, a physics experiment was carried out. First, a 0.250 kg ball with zero net charge was dropped from rest at a height of 1.00 m. The ball landed 0.350 s later. Next, the ball was given a net charge of 7.60 muC and dropped in the same ...
*February 13, 2012 by DAVE*

**physics**

A golf ball is dropped from rest from a height of 8.20 m. It hits the pavement, then bounces back up, rising just 5.40 m before falling back down again. A boy then catches the ball when it is 1.40 m above the pavement. Ignoring air resistance, calculate the total amount of ...
*September 8, 2012 by tom*

**physics**

A golf ball is dropped from rest from a height of 8.20 m. It hits the pavement, then bounces back up, rising just 5.40 m before falling back down again. A boy then catches the ball when it is 1.40 m above the pavement. Ignoring air resistance, calculate the total amount of ...
*September 8, 2012 by andy*

**physics**

A golf ball is dropped from rest from a height of 9.60 m. It hits the pavement, then bounces back up, rising just 5.30 m before falling back down again. A boy then catches the ball when it is 1.11 m above the pavement. Ignoring air resistance, calculate the total amount of ...
*September 17, 2012 by Anonymous*

**physics**

A golf ball is dropped from rest from a height of 8.40 m. It hits the pavement, then bounces back up, rising just 5.30 m before falling back down again. A boy then catches the ball when it is 1.20 m above the pavement. Ignoring air resistance, calculate the total amount of ...
*September 18, 2012 by gary*

**Math - 3rd grade summer work**

A Super-Duper ball bounces twice its height when it is dropped. Carl dropped a Super-Duper ball from the roof of a 12-foot garage. How high will the ball bounce after 5 bounces?
*June 22, 2014 by Kay*

**Science**

A ball of mass 200 g is dropped from a height 3 m above the ground onto a hard floor, and rebounds to a height of 2.2 m. If the ball is in contact with the floor for 0.002 s calculate the average force exerted by the floor on the ball
*March 7, 2014 by Thobiswa*

**physics**

a ball mass 800g is dropped from height of 5m and rebounds to a hight of 3.8m the air resistance is negligible. calculate a. the kinetic energy of the ball just before impact b. the initial rebound speed of the ball c. the energy transferred to the ground during impact
*December 13, 2010 by lewis*

**physics**

A spherical mass 'm'is dropped vertically off a building starting from rest and 'y=0'.the mass experience a resistive force 'FR=-bv'.let 'r=b/m'.find the position'y(t)'of mass??? pizzzzzzzzzzz help me.........
*April 30, 2012 by m sani*

**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*

**maths**

A ball is dropped from a height of 1 metre. At every bounce it travels half of the height it travelled it with the previous flight. Find the total distance travelled when the ball comes to rest.
*December 27, 2012 by anitha*

**PHYSICS**

ball is dropped downwards. After 1 sec another ball is dropped from the same point . What is distance between them after 3sec A 25m B 20m C 50m D 9.8m
*June 11, 2014 by AYESHA*

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