A bullet is fired in a horizontal direction with a muzzle velocity of 300m/s.in the absence of air resistance,how far will it have droppped in travelling a horizontal distance of 20m.
S=horizontal vel. × time
20=300×t
t=20/309
t=0.067
S=1/2at^2
S=0.5×10×0.00444
S=0.222m