If the displacement velocity and acceleration of a particle at time t
be x,v and f respectively, then which one is true?

Options

A. (a) `f=v^3(d^2t)/(dx^2)`
B. (b) `f=-v^3(d^2t)/(dx^2)`
C. (c) `f=v^2(d^2t)/(dx^2)`
D. (d) `f=-v^2(d^2t)/(dx^2)`

Answer

B