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Question

A 5kg block is tied to a 1m string and is rotated with a constant angular velocity of 2 rad/sec in the horizontal plane. Find the linear momentum of the block.


A

5 m/s

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B

10 N

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C

2.5 N

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D

10 kg m/s

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Solution

The correct option is D

10 kg m/s


Angular velocity ω = 2rad/sec

Radius = length of string = 1m

Speed v = r ω

v = 2 m/s

Momentum = mass × speed

= 5 × 2

= 10 kg m/s


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