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Manipal Entrance Test 2016 Physics Paper

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Question : 10

Total: 50

Four identical balls, A,B,C and D are placed on a smooth horizontal plane such that B,C and D are in one line and are in contact and A is kept along the same line but a distance away. Now, A is set in motion with speed v alongthe line and it strikes the ball B. After this collision, which is elastic.

Balls A,B,C will be at rest and D will move with speed v
A will be at rest, where B,C and D will move together with speed
v
3
A will rebound with speed
v
2
while B,C and D will move together with speed
v
2
A,B,C and D will move together with speed
v
4

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