Question

calculate the net force shown in the diagram?

Explanation:

Step1: Determine the direction of forces

Assume upward as positive ($16$ N) and downward as negative ($- 25$ N).

Step2: Calculate net force

Net force $F = 16+(-25)$.
$$F=16 - 25=-9\text{ N}$$
The magnitude is $9$ N.

Answer:

$9$ N