A force of 20 N acts on a body of mass 5kg at rest. What is the acceleration of the body? What is its velocity after 5 seconds if the same force acts? After 5 seconds if the force ceases to act how will the body move?

Answer

(i) 4 `ms^(-2)`
(ii) 20 `ms^(-1)`
(iii) When the force ceases to act, the body continues to move with uniform velocity 20 `ms^(-1)` along a straight line by Newton.s first law. (In the absence of friction)