Question

A boy is pushing a chair by applying a force of 5 newtons. His mother helps him push it faster by applying an additional force of 7 newtons in the same direction. What is the net force acting on the chair?

Answer 1

A boy is pushing a chair by applying a force of 5 newtons. His mother helps him push it faster by applying an additional force of 7 newtons in the same direction. What is the net force acting on the chair?

**Solution:**

Net force acting on the chair:

$$\begin{array}{l} \vec{F}_{\text{result}} = \vec{F}_1 + \vec{F}_2 \\ \text{x: } F_{\text{result}} = F_1 + F_2 = 5N + 7N = 12N \end{array}$$

**Answer:** net force is 12N