A particle is projected from the ground with an initial velocity of 20ms^-1 at an angle of 30⁰ with horizontal. The magnitude of change in velocity in 0.5 seconds is(g=10ms^-1)

A juggler maintains four balls on motion, making each inturn rise to a height 20m from his hand. Where will the other three balls be at the instant when the fourth one is just leaving the hand?

A body is thrown vertically upward with an initial velocity u reaches maximum height in 6 sec.The ratio of distance travelled by the body in the first and seventh second is :

A bomb is dropped from an aircraft travelling horizontally at 150m/s at a height of 490m. The horizontal distance travelled by the bomb before it hits the ground is (in metre):

A body is projected from the earth at angle 30⁰ with the horizontal with some intial velocity. If its range is 20 m, the maximum height reached by it is : (in metres)