question_answer

A car stops and then a start accelerating uniformly at rate of \[3\,\,m\,\,{{s}^{-2}}\], speed of car after 20 seconds is

A)  \[40\,\,m\,\,{{s}^{-2}}\]                      

B)  \[60\,\,m\,\,{{s}^{-2}}\]

C)  \[100\,\,m\,\,{{s}^{-2}}\]                    

D)  \[30\,\,m\,\,{{s}^{-2}}\]