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8 A block of mass 10kg is initially at rest on a horizontal rough surface...

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8 A block of mass 10kg is initially at rest on a horizontal rough surface At a time t 0 a time dependent force F acts on it horizontally as shown in the figure Force F stops acting at t 7 seconds Consider that coefficient of static and kinetic friction both are equal to 0 5 and g 10 ms 2 10kg F N 100 40 I 1 7 t s 1 mv2 2 30 110x60x60 a Maximum kinetic energy acquired by the block is 125 J b Maximum kinetic energy acquired by the block is 50 J c Total time for which the block is moving with non zero velocity is 5 4 s d Total time for which the block is moving with non zero velocity is 7 4 s

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