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

A raindrop falling from a height h above ground, attains a near termin

1.	A raindrop falling from a height h above ground, attains a near terminal velocity when it has fallen througha height(3//4)h. Which of the diagrams shown the change in kinetic and potential energy of the drop during its fall up to the ground ?
Answer» Solution :At a height `h` above the ground, `P.E.` of RAINDROP is maximum and `K.E.=0` . As the raindrop falls, its `P.E.` GOES on decreasing and K.E. goes on increasing upto a point `h//4` above the ground. At this stage, rain drop has ACQUIRED near terminal velocity `(=` constant ). Therefore, at this stage, K.E. tends to be constant. P.E.becomes zero when raindrop falls to the ground. CHOICE (b) is most APPROPRIATE.