question_answer

A body is acted upon by a constant force from time\[t=0\]to a time\[t=T\]after which it does not experience any force. Which of the following graphs best represents the variation of the velocity of the body with time?

A)  

B)  

C)     

D)  

E)  

Correct Answer: D

Solution :

Rate of change of velocity gives acceleration. When body is acted upon by a constant force, its velocity increases constantly with time, after which velocity is constant. Hence, acceleration is zero and particle does not experience any force.