9. A body having an initial velocity of 10 m/s moves 200 mm in 5 sec when a force of 20 kgf is applied to it. If the acceleration due to gravity is 9 m/s2 the weight of the body should be
A. 15 kg
B. 18.35 kg
C. 11 kg
D. 16.5 kg
9. A body having an initial velocity of 10 m/s moves 200 mm in 5 sec when a force of 20 kgf is applied to it. If the acceleration due to gravity is 9 m/s2 the weight of the body should be
A. 15 kg
B. 18.35 kg
C. 11 kg
D. 16.5 kg