question_answer

A body of mass 3 kg is acted on by a force which varies as shown in the graph. The momentum acquired is given by

A)  zero                                     

B)  \[5\text{ }N-s\]

C)  \[30N-s\]                           

D)  \[50\text{ }N-s\]

Correct Answer: D

Solution :

                  Momentun = Area of the graph \[=\frac{1}{2}\times 2\times 10+10\times 4\] \[=10+40=50N-s\]