Work Energy And Power

Same force acts on two bodies of masses  and (> ). After travelling the same distance,

A
Kinetic energy of is greater than kinetic energy of
B
Kinetic energy of is greater than kinetic energy of
C
Ratio of kinetic energies of those two is equal to ratio of their momentum
D
Kinetic energy of is equal to kinetic energy of
Medium
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A heavier body moving with certain velocity collides head on elastically with a lighter body at rest. Then

A
smaller body continues to be in the same state of rest
B
smaller body starts to move in the same direction with same velocity as that of bigger body
C
the smaller body starts to move with twice the velocity of the bigger body in the same direction
D
the bigger body comes to rest
Medium
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A ball of mass M moving with a velocity V collides head on elastically with another of same mass but moving with a velocity v in the opposite direction. After collision,

A
the velocities are exchanged between the two balls
B
both the balls come to rest
C
both of them move at right angles to the original line of motion
D
one ball comes to rest and another ball travels back with velocity 2V
Medium
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