Q.

At a place where the acceleration due to gravity is 10 m sec−2a force of 5 kg-wt acts on a body of mass 10 kg initially at rest. The velocity of the body after 4 second is

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a

5 m sec−1

b

10 m sec−1

c

20 m sec−1

d

50 m sec−1

answer is C.

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Detailed Solution

Alcceleration = Force  Mass =50N10kg=5m/s2  From v=u+at=0+5×4=20 m s-2
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