Canadian Adult Achievement Test (CAAT) — Level C

A heavy box is sitting motionless on a flat floor. Which statement best explains why the box is not moving?

There are no forces acting on the box. The force of gravity is weaker than the force of friction. The downward force of gravity and the upward force from the floor are balanced. The box has too much inertia to be affected by gravity.

Correct Answer:

The downward force of gravity and the upward force from the floor are balanced.

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