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Q.

A body of mass 2kg is sliding down on an inclined plane of inclination 530 to the horizontal. If coefficient of kinetic friction is 0.5, time taken by a body released from the top of an inclined plane to such the ground if the length of the inclined plane is 10(g=10ms2),(sin530=45)  

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a

2 s

b

4 s

c

8 s

d

12 s

answer is B.

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Detailed Solution

t=2lg(sinθμkcosθ)

t=2sec

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