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Q.

A block of mass 2 kg is suspended from a string, is released from a height of 5 m as shown in figure then what will be the impulse when string. Just becomes tight : 

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a

0.2 N s

b

2 Ns

c

200 N s

d

20 N s

answer is C.

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Detailed Solution

I=ΔP=m(v−u)=2(2gh−0)=22×10×5=20Ns

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A block of mass 2 kg is suspended from a string, is released from a height of 5 m as shown in figure then what will be the impulse when string. Just becomes tight :