Sarthaks Test
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A body of mass 2kg travels according to the law x(t ) = pt + qt2 + rt3 where p = 3ms-1, q = 4ms-2 and r = 5ms-3 .

The force acting on the body at t = 2 seconds is

(a) 136 N

(b) 134 N

(c) 158 N

(d) 68 N

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The force acting on the body at t = 2 seconds is - (a) 136 N

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