Question
A ball of mass 'm' moving horizontally at a speed 'v' collides with the bob of a simple pendulum at rest. The mass of the bob is also' 'm, if the collision is perfectly elastic, the bob of the pendulum will rise to a height of
Answer: Option B
:
B
In an elastic collision between two bodies of the same mass with one of them initially at rest, the movingbody is brought to rest and the other moves in the same direction with the same speed. Thus the ballwill come to rest and the bob of the pendulum acquires a speed v. At this speed, it will rise to height h givenby h=v22g. Hence the correct choice is (b).
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:
B
In an elastic collision between two bodies of the same mass with one of them initially at rest, the movingbody is brought to rest and the other moves in the same direction with the same speed. Thus the ballwill come to rest and the bob of the pendulum acquires a speed v. At this speed, it will rise to height h givenby h=v22g. Hence the correct choice is (b).
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