Question
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
Options :
136 N
134 N
158 N
68 N
Answer :
136 N
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