Question

week 8 staar questions / jayden moreno - what are newtons laws of motion a newtons first law of motion b newtons second law of motion c newtons third law of motion d newtons fourth law of motion 3 gravity applies a downward force of 500 n on a standing student. what is the strength and direction of the floors force against the students feet? a 500 n downward b 100 n downward c 100 n upward d 500 n upward

Explanation:

Step1: Identify the force - equilibrium situation

The student is standing still, so the net force on the student is zero. According to Newton's third - law, for every action, there is an equal and opposite reaction. The force of gravity acting on the student is the action force, and the floor exerts a reaction force.

Step2: Determine the magnitude and direction of the floor's force

The force of gravity on the student is 500 N downward. Since the net force on the student is zero, the floor must exert a force of 500 N upward to balance the force of gravity.

Answer:

D. 500 N upward