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Q.

A force represented as shown in figure acts on a body having a mass of $16 k g$ . The velocity of the body at $t = 10 s$ , if the body starts from rest :-

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a

$50 m / s$

b

$39 m / s$

c

$49 m / s$

d

$100 m / s$

answer is D.

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Detailed Solution

$J = M (v_{f} - v_{i})$

or $50 \times 5 + 75 \times 5 = 16 (v_{f} - 0)$

$∴ v_{f} = 39 m / s$

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