A particle moves with a tangential acceleration a_t= a v where a =(5 i ) m / s ^2 . If the speed of the particle is zero at x =0 , then find v ( in m / s ) at x =4.9 ~m .

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Quantrex Academy · Accepted Answer

Correct answer: 7

As v d v= a d r =a d x=5 d x ₀^v v d v=5 ₀^ 4.9 d x v^2 2 =5(4.9) v ^2=49 v =7 ~m / s

A particle moves with a tangential acceleration a_t= a v where a =(5 i ) m / s ^2 . If the speed of the particle is zero at x =0 , then find v ( in m / s ) at x =4.9 ~m .

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