Question

A box is being pushed in two opposite directions. The force applied by the person pushing it to the left is 10 N, while it is being pushed 20 N to the right, The box moved to the left and vector sum of the applied forces is 30 N to the right

Answer 1

If the first person pushes to the left at 10 N, and the second person pushes to the right at 20 N, the vector um is

$$R=20-10=10\text{ N to the right}.$$