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Question

A particle of unit mass undergoes one-dimensional motion such that its velocity varies according to v(x)= bx2n, where b and n are constants and x is the position of the particle. The acceleration of the particle as a function of x, is given by

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Solution

Given:
v(x)=bx2n

Differentiating both sides:
dvdx= 2nbx2n1

We know that, acceleration of the particle as a function of x is given as:
a(x)=vdvdx=(bx2n)[2bnx2n1]

a(x)= 2nb2x4n1

Hence, the option (A) is correct.

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