A body of mass 5kg initially at rest is subjected to a force of 20N. What is the kinetic energy acquired by the body at the end of 10s?

Explanation

A body with constant speed of 1 cm`cdot s^(-1)` receives impulse of magnitude 0.04 kg`xx 0.02 m cdot s^(-1) = 8 xx 10^(-4) "kg" cdot "cm" cdot s^(-1)` after every 2 s from the walls at x = 0 and x = 2 cm.