The linear momentum p of a body of mass 2 kg varies with time t as p=3t2+4 where p and t are in SI units. It follows that the body is moving with a

Now, mv=3t2+4. Since m=2kg,v=32t2+2. The acceleration is a=dvdt=ddt32t2+2=3t.Thus, the acceleration of the body is increasing with time.Hence the correct choice is (c).