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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

2412 kg ms1

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B

2160 kg ms1

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C

3000 kg ms1

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D

1080 kg ms1

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Solution

The correct option is D

1080 kg ms1


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

50(ugt)=50(100(5+3)9.8)=1080 kg ms1


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