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A body of mass 2 kg travels according to...

A body of mass 2 kg travels according to the law` x (t) = pt + qt^2 + rt^3` where `p = 3 ms^-1` q = 4 ms^-2` and ` r = 5 ms^-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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