In the free-body diagram, the magnitude of the normal force is 35 N, the friction force is 15 N, and the net force is 70 N. What is the magnitude of the applied force? Explain how you came to your answer in one to two sentences.

Question

(2 points)

Answer 1

In this case, the magnitude of the applied force can be determined by using the equation of motion: net force = applied force - friction force. So, rearranging the equation we can find that the magnitude of the applied force is equal to the net force plus the friction force, which in this case is 70 N + 15 N = 85 N.