question_answer

A body is thrown vertically upwards. Which one of the following graphs correctly represent the velocity vs time?              JEE Main Solved Paper-2017

A)                

B)  

C)  

D)  

Correct Answer: A

Solution :

 Velocity at any time t is given by \[v=u+at\] \[v={{v}_{0}}+(-g)t\] \[v={{v}_{0}}-gt\] \[\Rightarrow \]               straight line with negative slope