A 20 kg body is pushed with 7 n for 1.5 sec then with a force of 5 N for 1.7 sec and finally with a force of 10N for 3 sec, the total impulse applied to the body and change in velocity will be
49 Ns, 12.5 ms-1
49 Ns, 2.45 ms-1
98 Ns, 4.9 ms-1
4.9 Ns, 2.45 ms-1