Question

A ball is dropped from the top of a building. The gravitational force is 10 N down, and the force of air resistance is 1 N up. What is the net force?

Answer 1

The net force is 10N - 1N = 9N in the downward direction.

Answer 2

Answer:
Net force is 9 Newtons in the downwards direction

Explanation:
Assume that the downwards direction is the default direction having the positive sign
This means that the upwards direction will be having the negative sin
Net force = -1 + 10 = +9 newtons
Therefore, the total force is 9 newtons in the positive (downwards) direction

Hope this helps :)