Answer the following questions.
a. Will the velocity of a stone thrown vertically upwards remain constant or will it change with time?
b. How will it change?

Explanation

a. When the stone is thrown upwards, its velocity goes on decreasing due to acceleration of gravity acting downwards.
b. (i) At maximum height, the velocity becomes zero and the stone falls down under the action of gravity.
(ii) The maximum height depends upon the initial vertical velocity.