A raindrop falling from a height `h` above ground, attains a near terminal velocity when it has fallen through a height `(3//4)h`. Which of the diagrams shown in figure correctly shows the change in kinetic and potential energy of the drop during its fall up to the ground ?

Options

A. .
B. .
C. .
D. .

Answer

B

Explanation

When drop falls first velocity increases, hence, first `KE` also increases. After sometime speed (velocity) is constant this is called terminal velocity, hence, `KE` also become constant. `PE` decreases continuosly as the drop is falling continuosly. The variation in `PE` and `KE` is best represented by `(b)`.