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General
Easy
Question
Two massless string of length 5 m hang from the ceiling very near to each other as shown in the figure. Two balls A and B of masses 0.25 kg and 0.5 kg are attached to the string. The ball A is released from rest at a height 0.45 m as shown in the figure. The collision between two balls is completely elastic. Immediately after the collision, the kinetic energy of ball B is 1 J. The velocity of ball A just after the collision is
- 5 ms–1 to the right
- 5 ms–1 to the left
- 1 ms–1 to the right
- 1 ms–1 to the left
The correct answer is: 1 ms–1 to the left
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