Question

An object of mass 30 kg is falling in air and experiences a force due to air resistance of 50 newtons.

- determine the net force acting on the object and calculate the acceleration of the object

Answer 1

According to Newton's second law:

$$ma=mg-F,\\ a=g-\frac{F}{m}=8.13\text{ m/s}^2.$$

The net force:

$$F_{net}=ma=243.9\text{ N}$$