A shell in flight explodes into n equal fragments. Some k of the fragments land on the ground earlier than the rest. After the explosion, the acceleration of the centre of mass of all the fragments is:

Question

Accepted Answer

g. The explosion involves only internal forces, so the centre of mass continues under gravity alone with acceleration g (the standard intended answer for this classic problem is g).

A shell in flight explodes into n equal fragments. Some k of the fragments land on the ground earlier than the rest. After the explosion, the acceleration of the centre of mass of all the fragments is:

Solution

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