Question

Identify the action-reaction pair when a sprinter uses a set of starting blocks for the start of a sprint race.

Answer 1

The action-reaction pair when a sprinter uses a set of starting blocks for the start of a sprint race is the sprinter exerting a force on the blocks, and the blocks exerting an equal and opposite force on the sprinter.

Step-by-step explanation:

The action-reaction pair when a sprinter uses a set of starting blocks for the start of a sprint race is:

Action: The sprinter exerts a force on the starting blocks backward.

Reaction: The starting blocks exert an equal and opposite force on the sprinter forward.

This action-reaction pair allows the sprinter to push off the blocks and propel themselves forward with more force, helping them achieve a faster start in the race.

Answer 2

Newton's 3rd law of motion:

The size of the forces on the first object equals the size of the force on the second object. ... Consider a sprinter on the starting blocks, when the starting pistol is fired the sprinter will exert a force between their feet and the starting blocks to push off quickly into motion.