A small drop of water falls from rest through a large height $h$ in air; the final velocity is
$ \propto \,\sqrt h $
$ \propto \,h$
$ \propto \,(1/h)$
Almost independent of $h$
Assume that, the drag force on a football depends only on the density of the air, velocity of the ball and the cross-sectional area of the ball. Balls of different sizes but the same density are dropped in an air column. The terminal velocity reached by balls of masses $250 \,g$ and $125 \,g$ are in the ratio
Why is dust particles settled down on floor in a closed room ? Explain.
Which of the following graphs best represents the motion of a raindrop?
A ball of radius $r $ and density $\rho$ falls freely under gravity through a distance $h$ before entering water. Velocity of ball does not change even on entering water. If viscosity of water is $\eta$, the value of $h$ is given by
A small drop of water falls from rest through a large height $h$ in air; the final velocity is ................