Question

indicate which law of motion applies to each example. write one correct answer in each box. first law second law third law law of motion example a foot hits a soccer ball with 50 n of force, the ball exerts the same force back. a tennis ball flies through the air, and continues to travel until a force stops it. a seatbelt exerts more force to stop an adult compared to stopping a child. a golf club hits two golf balls with the same force, but the smaller golf ball accelerates faster.

Explanation:

• When a foot hits a soccer - ball with 50 N of force and the ball exerts the same force back, this is an example of Newton's Third Law which states that for every action, there is an equal and opposite reaction.
• A tennis ball flying through the air and continuing to travel until a force stops it is an example of Newton's First Law (the law of inertia), which states that an object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an external force.
• A seat - belt exerting more force to stop an adult compared to stopping a child and a golf club hitting two golf balls with the same force but the smaller one accelerating faster are examples of Newton's Second Law ($F = ma$), which shows the relationship between force, mass, and acceleration.

Answer:

• First row: Third Law
• Second row: First Law
• Third row: Second Law
• Fourth row: Second Law