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Q.

if the velocity of a body changes as v= 4t. Find the displacement in first 4 s if the body starts from rest

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a

16 m

b

8 m

c

64 m

d

32 m

answer is B.

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Detailed Solution

S= $\int_{0}^{4} 4 t d t = {[\frac{4 t^{2}}{2} = 2 t^{2}]}_{0}^{4}$

= 32 m

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if the velocity of a body changes as v= 4t. Find the displacement in first 4 s if the body starts from rest