Q3 of 25 Page 130

A feather of mass 10g is dropped from a height. It falls with a constant velocity. What is the net force acting on it?

Net force acting on it is zero.

Explanation:


The feather is falling with constant velocity. It means the acceleration of the feather is zero. If the acceleration is zero, it means there is no net force acting on the feather.


As we know, Force, F = mass × acceleration.


Also, the gravitational force (downward force) and air drag (upward force) cancels out each other resulting in constant velocity of a feather.


The figure is shown below:



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