Question

Laura needs to move a box that weighs 50 kg with a normal force of 45 N. The floor exerts a friction force of 35 N. What force must she exert to move the box? Find the total force of the system.

A. 10 N
B. 20 N
C. 35 N
D. 45 N

Answer 1

Laura must exert a force of 10 N to move the box.

Step-by-step explanation:

To find the force Laura must exert to move the box, we need to calculate the net force acting on the box. The net force is equal to the force of friction subtracted from the force Laura exerts. In this case, the force of friction is 35 N and Laura exerts a normal force of 45 N, so the net force is 45 N - 35 N = 10 N. Therefore, Laura must exert a force of 10 N to move the box.