A Bullet Mass = M) Is Fired at Speed V

question 44

Multiple Choice

A bullet mass = m) is fired at speed V into a block of mass M with M > m) which is hanging vertically from a light string of length L. The bullet stops in the block. If the recoiling block + bullet system reaches a height of 2/3L, then the initial speed of the bullet is given by

• A) M  1gL/3)^1/2/m.
• B) M  2gL/3)^1/2/m.
• C) M  3gL/4)^1/2/m.
• D) m  4gL/3)^1/2/M.
• E) M  4gL/3)^1/2/m.

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