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Com in Perfectly Inelastic Collision

A projectile ...

Question

A projectile of mass 50 kg is projected vertically upward with a velocity of 100 m/s. After 5 seconds it explodes into two pieces, one piece of 20 kg moving vertically upward with a velocity of 150 m/s. The algebraic sum of the momentum of the system 3 seconds later is

A

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B

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C

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D

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Solution

The correct option is D

The algebraic sum of the moment of the system 3s later is,

$50 (u - g t) = 50 (100 - (5 + 3) 9.8) = 1080 k g m s^{- 1}$

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