Question

a student presses on a box horizontally with a force of 200 newtons and the box does not move. assuming the box is stationary and on level ground, what must the force of static friction on the box be equal to? 200 newtons 9.8 newtons 20.4 newtons 167 newtons 100 newtons

Explanation:

Step1: Analyze the state of the box

The box is stationary, so it is in equilibrium. According to Newton's first law, the net force acting on it is zero.

Step2: Consider the horizontal forces

The horizontal forces are the applied force \(F = 200\space N\) and the static - friction force \(f_s\). Since the net force \(F_{net}=F - f_s=0\) (because the box is not moving), then \(f_s=F\).

Answer:

200 Newtons