Question

If a 75kg skydiver is falling and getting air resistance of 735N, what is the acceleration on the skydiver?

Answer 1

According to Newton's second law, the acceleration is a consequence of the net force acting on a body, or

$$a=\frac{F_\text{net}}{m}=\frac{mg-R}{m}=g-\frac Rm=0.$$

The skydiver is falling with terminal velocity (constant velocity, zero acceleration).