question_answer

The linear momentum p of a body varies with time and it is given by equation \[p=x+y{{t}^{2}}\] where \[x\] and \[y\] are constants. The net force acting on the body for a one dimensional motion is :

A)  proportional to \[{{t}^{2}}\]      

B)  constant            

C)         proportional to \[\frac{1}{t}\]

D)        proportional to t