boy aims a gun at a target from a point, at a horizontal distance of 100 m. If the gun can impart a horizontal velocity of 500 ms-1 to the bullet, the height above the target where he must aim his gun, in order to hit it is (Takeg = 10 ms-2)


Correct option is

20 cm


The time taken to cover 100 m = 100 m/500 ms-1 = 0.2 s. The downwards distance moved in this time




cannon on a level plain is aimed at an angle α above the horizontal and a shell is fired with a muzzle velocity v0­ towards a vertical cliff a distance Raway. Then the height from the bottom at which the shell strikes the side walls of the cliff is