Question

a body starts from rest and is acted on by a constant force.the ratio of kinetic energy gained by it in the first 5 seconds to that gained in the next five seconds

Answer 1

Ke =1/2mv^2 v=at
Ke1/ke2=v1^2/v2^2=t1^2/t^2=25/100=1/4
F constant so a will be also