Motion Test - 3...

A wooden block of mass $$10$$ gm is dropped from the top of a cliff $$100$$ m high. Simultaneously a bullet of mass $$10$$ gm is fired from the foot of the cliff  upward with a velocity $$100$$ m/s. The bullet and the wooden block will meet each other after a time of:

A ball is thrown upwards. It takes 4 s to reach back to the ground. Find its initial velocity.

A boy standing at the top of a tower of 20 $$m$$ height drops a stone. Assuming $$g=10 ms^{-2}$$, the velocity with which it hits the ground is:

Suppose a boy is enjoying a ride on a merry-go-round which is moving with a constant speed of $$10\ ms^{-1}$$. It implies that the boy is :

A body is thrown vertically upwards with a velocity $$u$$, the greatest height $$h$$ to which it will rise is:

The velocity of a bullet is reduced from $$100 \ m/s$$ to $$0 \ m/s$$ while travelling through a wooden block of thickness $$10\  cm$$. The retardation, assuming it to be uniform will be:

Two bodies, A(of mass 1kg) and B(of mass 3kg),are dropped from heights of 16 m and 25 m respectively. The ratio of the time taken by them to reach the ground is:-

A particle is moving in a circular path of radius $$r$$. The magnitude of displacement after half a circle would be :

A ball is dropped from height $$h$$ and another from $$2h$$. The ratio of time taken by the two balls to reach ground is:

If a body is thrown up with the velocity of $$15 m/s$$, then maximum height attained by the body is $$(g=10 \ m/s^2)$$