Question
30. A gun mounted on the top of a moving truck is aimed in the backward direction at an angle of 30�to the vertical . If the muzzle velocity of the bullet fired from the gun is 4 m/s , then the speed of the truck that will make the bullet come out vertically is - a) 0.5 m/s b) 1m/s c) 1.5 m/s d) 2m/s