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Question

A body is moving with a velocity of 72 km/h on a rough horizontal surface of coefficient of friction 0.5. If the acceleration due to gravity is 10 m/s2. Find the distance covered it comes to rest.

A
10 m
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B
20 m
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C
30 m
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D
40 m
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Solution

The correct option is D 40 m
40m

s=v2u22a

=02(20)22(0.5×10)

=40010=40m


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