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Q.

The position-time graph of a body of mass 2 kg is shown in Figure.What is the impulse on the body at t = 4 s ?

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a

5kg ms-1

b

+ 10kg ms-1

c

- 10kg ms-1

d

Zero

answer is C.

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Detailed Solution

Impulse = Change in momentum = m (v2- v1)= 2[0 - 5]= - 10kg m/s
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