Thank you for reporting, we will resolve it shortly
Q.
A spherical ball is dropped in a long column of a highly viscous liquid. The curve in the graph shown, which represents the speed of the ball $(v)$ as a function of time $( t )$ is :
Initially speed is zero, then increases & after some time it becomes constant.
Acceleration (slope of $v/t$ curve) of ball first decreases and after some time it becomes zero.
