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General
Easy
Question
A ball of mass m = 60gm is shot with speed v0 = 22m/s into the barrel of spring gun of mass M = 240g initially at rest on a frictionless surface. The ball sticks in the barrel at the point of maximum compression of the spring.
What fraction of initial kinetic energy of the ball is now stored in the spring?
- 0.2
- 0.8
- 0.4
- 0.6
The correct answer is: 0.2
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