The motion of a particle is described by the equation `x = a+bt^(2)` w – InterviewSolution

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1.	The motion of a particle is described by the equation `x = a+bt^(2)` where `a = 15` cm and `b = 3 cm//s`. Its instantaneous velocity at time 3 sec will beA. 36 cm/secB. 18 cm/secC. 16 cm/secD. 32 cm/sec
Answer» Correct Answer - B `x=a+bt^(2)therefore(dx)/(dt)=2bt` at t=3 sec `therefore` velocity =2bt`=2xx3xx3=18 cm//s`

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