If an object is released in air, the magnitude of its acceleration would begain at the free-fall value, but it would decrease continously to zero as the object continued to fall.
for which one of the choices given does the solid line best represent the speed of the object as a function of time when it is dropped from rest in air?
Note The deshed line shows the free-fall under vacuum graph for comparison.

Options

A.
B.
C.
D.

Answer

D

Explanation

As per graph (from v-t graph)
acceleration should decrease with time which is shown by graph (D)