A 50kg obect falling through the air experiences a drag force of 90N. The acceleration of gravity is #9.8m/s^2#. What is the magnitude of the net force on the mass?

1 Answer
Oct 22, 2015



The weight of the object acting downwards #= 50"gN"=490"N"#

The drag which acts in the opposite direction #=90"N"#

So the net force #=490-90=400"N"#

At the point where the weight equals the drag, there is no net force acting on the object. Since Force = mass x acceleration the acceleration is zero and the object moves at constant velocity.

This is known as "terminal velocity".