Q.

An electron starting from rest has a velocity that increases linearly with time, that is, v = kt where k = 2 m/s2. The distance covered in the first 3 sec, will be:

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a

9m

b

16m

c

27 m

d

36 m

answer is A.

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Detailed Solution

v=dxdt=kt⇒∫0xdx=∫03kt dt ⇒x=9m
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