Question

a student pushes a heavy box horizontally, and it begins to move. which of the following statements best describes the horizontal forces acting on the box? a the pushing force is equal to the force of friction. b the pushing force is greater than the force of friction. c the pushing force is less than the force of friction. d friction only acts on the box once the box is already moving.

Explanation:

When an object starts to move, the applied pushing - force must overcome the static friction first. Once the box is moving, the pushing force is greater than the kinetic friction force acting on it. Static friction resists the start of motion and kinetic friction acts during motion.

Answer:

B. The pushing force is greater than the force of friction.