Derive an expression for the acceleration due to gravity on the surface of the earth. State the factors on which g depends. How does it vary with depth? Where is it maximum on the surface of the earth?

A boy drops a stone from a cliff which reaches on the ground in B seconds. Calculate

Height of cliff

A boy drops a stone from a cliff which reaches on the ground in B seconds. Calculate

Final velocity of the stone.

A stone thrown vertically upwards takes 3 seconds to attain maximum height, calculate

Initial velocity of stone

A stone thrown vertically upwards takes 3 seconds to attain maximum height, calculate 

Maximum height attained by the stone.