A body of mass 5 kg rests on a rough horizontal surface of friction coefficient 0.2. The is pulled through a distance 10 m by a horizontal force of 25N. The kinetic energy acquired by it is
A
200J
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B
150J
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C
100J
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D
50J
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Solution
The correct option is B150J Friction force on body is f=μmg=0.2×5×10=10N