Question

A particle is moving in a straight line such that its velocity is increasing at 5 ms–1 per meter. The acceleration of the particle is _______ms–2 at a point where its velocity is 20 ms–1.

Answer 1

$\frac{dv}{ds}=5^{-1}/m$
a=v $\frac{dv}{ds}$
=20×5=100 m/sec2