Collisions
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PHXI06:WORK ENERGY AND POWER

355264 A boy throws a ball with speed \(u\) in a well of depth 14 \(m\) as shown. On bounce with bottom of the well the speed of the ball gets halved. What should be the minimum value of \(u\) such that the ball may be able to reach his hand again? Assume that his hands are at 1 \(m\) height from top of the well while throwing and catching.
supporting img

1 \(30\,m{s^{ - 1}}\)
2 \(15\,m{s^{ - 1}}\)
3 \(28\,m{s^{ - 1}}\)
4 \(45\,m{s^{ - 1}}\)
PHXI06:WORK ENERGY AND POWER

355265 Assertion :
There is no loss in energy in elastic collision.
Reason :
Linear momentum is conserved in elastic collision

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
AIIMS - 2019
PHXI06:WORK ENERGY AND POWER

355266 For shown situation, if collision between block \({A}\) and \({B}\) is perfectly elastic, then find the maximum energy stored in spring is.
supporting img

1 \(1\,J\)
2 \(4\,J\)
3 \(9\,J\)
4 \(3\,J\)
PHXI06:WORK ENERGY AND POWER

355267 The friction coefficient between the horizontal surface and blocks \({A}\) and \({B}\) are \({\dfrac{1}{15}}\) and \({\dfrac{2}{15}}\) respectively. The collision between the blocks is perfectly elastic. Find the separation between the two blocks when they come to rest.
supporting img

1 \(5\,m\)
2 \(10\,m\)
3 \(3\,m\)
4 \(7\,m\)
PHXI06:WORK ENERGY AND POWER

355268 Six steel balls of identical size are lined up along a straight frictionless groove. Two similar balls moving with a speed \(v\) along the groove collide with this row on the extreme left hand then-
supporting img

1 All the six balls initially at rest will move on with speed \(v / 6\) each and two identical balls will come to rest
2 All the balls will start moving to the right with speed \(v / 8\) each
3 One ball from the right end will move on with speed \(2 v\), the remaining balls will be at rest.
4 Two balls from the extreme right end will move on with speed \(v\) each and the remaining balls will remain at rest.
NEET DIGITAL LIBRARY
PHXI06:WORK ENERGY AND POWER

355264 A boy throws a ball with speed \(u\) in a well of depth 14 \(m\) as shown. On bounce with bottom of the well the speed of the ball gets halved. What should be the minimum value of \(u\) such that the ball may be able to reach his hand again? Assume that his hands are at 1 \(m\) height from top of the well while throwing and catching.
supporting img

1 \(30\,m{s^{ - 1}}\)
2 \(15\,m{s^{ - 1}}\)
3 \(28\,m{s^{ - 1}}\)
4 \(45\,m{s^{ - 1}}\)
PHXI06:WORK ENERGY AND POWER

355265 Assertion :
There is no loss in energy in elastic collision.
Reason :
Linear momentum is conserved in elastic collision

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
AIIMS - 2019
PHXI06:WORK ENERGY AND POWER

355266 For shown situation, if collision between block \({A}\) and \({B}\) is perfectly elastic, then find the maximum energy stored in spring is.
supporting img

1 \(1\,J\)
2 \(4\,J\)
3 \(9\,J\)
4 \(3\,J\)
PHXI06:WORK ENERGY AND POWER

355267 The friction coefficient between the horizontal surface and blocks \({A}\) and \({B}\) are \({\dfrac{1}{15}}\) and \({\dfrac{2}{15}}\) respectively. The collision between the blocks is perfectly elastic. Find the separation between the two blocks when they come to rest.
supporting img

1 \(5\,m\)
2 \(10\,m\)
3 \(3\,m\)
4 \(7\,m\)
PHXI06:WORK ENERGY AND POWER

355268 Six steel balls of identical size are lined up along a straight frictionless groove. Two similar balls moving with a speed \(v\) along the groove collide with this row on the extreme left hand then-
supporting img

1 All the six balls initially at rest will move on with speed \(v / 6\) each and two identical balls will come to rest
2 All the balls will start moving to the right with speed \(v / 8\) each
3 One ball from the right end will move on with speed \(2 v\), the remaining balls will be at rest.
4 Two balls from the extreme right end will move on with speed \(v\) each and the remaining balls will remain at rest.
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PHXI06:WORK ENERGY AND POWER

355264 A boy throws a ball with speed \(u\) in a well of depth 14 \(m\) as shown. On bounce with bottom of the well the speed of the ball gets halved. What should be the minimum value of \(u\) such that the ball may be able to reach his hand again? Assume that his hands are at 1 \(m\) height from top of the well while throwing and catching.
supporting img

1 \(30\,m{s^{ - 1}}\)
2 \(15\,m{s^{ - 1}}\)
3 \(28\,m{s^{ - 1}}\)
4 \(45\,m{s^{ - 1}}\)
PHXI06:WORK ENERGY AND POWER

355265 Assertion :
There is no loss in energy in elastic collision.
Reason :
Linear momentum is conserved in elastic collision

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
AIIMS - 2019
PHXI06:WORK ENERGY AND POWER

355266 For shown situation, if collision between block \({A}\) and \({B}\) is perfectly elastic, then find the maximum energy stored in spring is.
supporting img

1 \(1\,J\)
2 \(4\,J\)
3 \(9\,J\)
4 \(3\,J\)
PHXI06:WORK ENERGY AND POWER

355267 The friction coefficient between the horizontal surface and blocks \({A}\) and \({B}\) are \({\dfrac{1}{15}}\) and \({\dfrac{2}{15}}\) respectively. The collision between the blocks is perfectly elastic. Find the separation between the two blocks when they come to rest.
supporting img

1 \(5\,m\)
2 \(10\,m\)
3 \(3\,m\)
4 \(7\,m\)
PHXI06:WORK ENERGY AND POWER

355268 Six steel balls of identical size are lined up along a straight frictionless groove. Two similar balls moving with a speed \(v\) along the groove collide with this row on the extreme left hand then-
supporting img

1 All the six balls initially at rest will move on with speed \(v / 6\) each and two identical balls will come to rest
2 All the balls will start moving to the right with speed \(v / 8\) each
3 One ball from the right end will move on with speed \(2 v\), the remaining balls will be at rest.
4 Two balls from the extreme right end will move on with speed \(v\) each and the remaining balls will remain at rest.
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PHXI06:WORK ENERGY AND POWER

355264 A boy throws a ball with speed \(u\) in a well of depth 14 \(m\) as shown. On bounce with bottom of the well the speed of the ball gets halved. What should be the minimum value of \(u\) such that the ball may be able to reach his hand again? Assume that his hands are at 1 \(m\) height from top of the well while throwing and catching.
supporting img

1 \(30\,m{s^{ - 1}}\)
2 \(15\,m{s^{ - 1}}\)
3 \(28\,m{s^{ - 1}}\)
4 \(45\,m{s^{ - 1}}\)
PHXI06:WORK ENERGY AND POWER

355265 Assertion :
There is no loss in energy in elastic collision.
Reason :
Linear momentum is conserved in elastic collision

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
AIIMS - 2019
PHXI06:WORK ENERGY AND POWER

355266 For shown situation, if collision between block \({A}\) and \({B}\) is perfectly elastic, then find the maximum energy stored in spring is.
supporting img

1 \(1\,J\)
2 \(4\,J\)
3 \(9\,J\)
4 \(3\,J\)
PHXI06:WORK ENERGY AND POWER

355267 The friction coefficient between the horizontal surface and blocks \({A}\) and \({B}\) are \({\dfrac{1}{15}}\) and \({\dfrac{2}{15}}\) respectively. The collision between the blocks is perfectly elastic. Find the separation between the two blocks when they come to rest.
supporting img

1 \(5\,m\)
2 \(10\,m\)
3 \(3\,m\)
4 \(7\,m\)
PHXI06:WORK ENERGY AND POWER

355268 Six steel balls of identical size are lined up along a straight frictionless groove. Two similar balls moving with a speed \(v\) along the groove collide with this row on the extreme left hand then-
supporting img

1 All the six balls initially at rest will move on with speed \(v / 6\) each and two identical balls will come to rest
2 All the balls will start moving to the right with speed \(v / 8\) each
3 One ball from the right end will move on with speed \(2 v\), the remaining balls will be at rest.
4 Two balls from the extreme right end will move on with speed \(v\) each and the remaining balls will remain at rest.
NEET DIGITAL LIBRARY
PHXI06:WORK ENERGY AND POWER

355264 A boy throws a ball with speed \(u\) in a well of depth 14 \(m\) as shown. On bounce with bottom of the well the speed of the ball gets halved. What should be the minimum value of \(u\) such that the ball may be able to reach his hand again? Assume that his hands are at 1 \(m\) height from top of the well while throwing and catching.
supporting img

1 \(30\,m{s^{ - 1}}\)
2 \(15\,m{s^{ - 1}}\)
3 \(28\,m{s^{ - 1}}\)
4 \(45\,m{s^{ - 1}}\)
PHXI06:WORK ENERGY AND POWER

355265 Assertion :
There is no loss in energy in elastic collision.
Reason :
Linear momentum is conserved in elastic collision

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
AIIMS - 2019
PHXI06:WORK ENERGY AND POWER

355266 For shown situation, if collision between block \({A}\) and \({B}\) is perfectly elastic, then find the maximum energy stored in spring is.
supporting img

1 \(1\,J\)
2 \(4\,J\)
3 \(9\,J\)
4 \(3\,J\)
PHXI06:WORK ENERGY AND POWER

355267 The friction coefficient between the horizontal surface and blocks \({A}\) and \({B}\) are \({\dfrac{1}{15}}\) and \({\dfrac{2}{15}}\) respectively. The collision between the blocks is perfectly elastic. Find the separation between the two blocks when they come to rest.
supporting img

1 \(5\,m\)
2 \(10\,m\)
3 \(3\,m\)
4 \(7\,m\)
PHXI06:WORK ENERGY AND POWER

355268 Six steel balls of identical size are lined up along a straight frictionless groove. Two similar balls moving with a speed \(v\) along the groove collide with this row on the extreme left hand then-
supporting img

1 All the six balls initially at rest will move on with speed \(v / 6\) each and two identical balls will come to rest
2 All the balls will start moving to the right with speed \(v / 8\) each
3 One ball from the right end will move on with speed \(2 v\), the remaining balls will be at rest.
4 Two balls from the extreme right end will move on with speed \(v\) each and the remaining balls will remain at rest.