question_answer

A body of mass 5 kg starts from the origin with an initial velocity \[u\to =30\widehat{i}+40\widehat{j}\,m{{s}^{-1}}.\] If a constant force \[F\to =\sqrt{6}\,\widehat{i}-0.5\widehat{j}\,N,\]acts on the body in time in which y component of the velocity becomes zero is:

A)  5 s                                         

B)  20 s

C)  40 s                                      

D)  80 s