Question

A block is projected with speed 20 m/s on a rough horizontal surface. The coefficient of friction (u) between the surfaces varies with time (t) as shown in figure. The speed of body at the end of 4 second will be ( g = 10 ms-2 ) :-


a) 2 m/s
b) 5 m/s
c) 7.2 m/s
d) 9.5 m/s

Answer 1

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