Question

sandra pushed a wooden block and it slid across the floor. the wooden block gradually slowed down and stopped after moving 10 meters. why did the block stop moving? the floor exerted a force that is opposite to the direction of the block’s motion. the block ran out of force. the floor absorbs force from the block. all objects stop moving because their natural state is to be still.

Explanation:

According to Newton's first - law, an object in motion will stay in motion unless acted upon by an external force. In this case, the floor exerts a frictional force on the block, which acts in the opposite direction of the block's motion, causing it to slow down and stop. Force is not something an object "runs out of", and the floor doesn't absorb force in the way described. Also, an object's natural state is not necessarily to be still as per Newton's laws.

Answer:

The floor exerted a force that is opposite to the direction of the block’s motion.