Question

Speed of falling of a ball in a viscous liquid is ............... that of a ball of smaller volume.

a) greater than b) less than c) equal to

Note: the two balls have the same mass.

Answer 1

think about the viscous liquid - it will engulf the ball and try to slow it down. for a given mass, the more surface area it can engulf, the better it will be at slowing it down because it can "grab" more of the ball.