Exam 3 Target 8 Retake Preap

1. Ted hits a nail with a hammer. Which of the following is a valid action-reaction pair for this scenario?

A. The hammer exerts a force on the nail; the nail exerts a force on the hammer.

B. The hammer exerts a force on the nail; the nail exerts a force on the board.

C. The nail exerts a force on the hammer; the hammer exerts a force on the board.

D. The hammer exerts a force on the board; the board exerts a force on the nail.

When Ted hits a nail with a hammer, there is an action-reaction pair involved. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. In this scenario, the action is the hammer exerting a force on the nail, and the reaction is the nail exerting an equal and opposite force on the hammer. Therefore, option a is the correct answer.

Explanation

When Ted hits a nail with a hammer, there is an action-reaction pair involved. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. In this scenario, the action is the hammer exerting a force on the nail, and the reaction is the nail exerting an equal and opposite force on the hammer. Therefore, option a is the correct answer.

2. Max and Kahleb are involved in a game of tug-of-war. Max is at one end of the rope pulling to the west, while Kahleb is at the other end pulling to the east. Which of the following pairs of forces describes an action-reaction pair for this situation?

A. The force Max exerts on the rope and the force the rope exerts on Max.

B. The force Max exerts on the rope and the force Kahleb exerts on the rope.

C. The force Kahleb exerts on the rope and the horizontal force the ground exerts on Kahleb.

D. The force Kahleb exerts on the rope and the horizontal force the ground exerts on Max.

The correct answer is a. The force Max exerts on the rope and the force the rope exerts on Max. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. In this situation, Max is exerting a force on the rope by pulling it to the west. As a reaction to this force, the rope exerts an equal and opposite force on Max, pulling him in the opposite direction. Thus, the force Max exerts on the rope and the force the rope exerts on Max form an action-reaction pair.

Explanation

The correct answer is a. The force Max exerts on the rope and the force the rope exerts on Max. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. In this situation, Max is exerting a force on the rope by pulling it to the west. As a reaction to this force, the rope exerts an equal and opposite force on Max, pulling him in the opposite direction. Thus, the force Max exerts on the rope and the force the rope exerts on Max form an action-reaction pair.

3. A 5000 kg truck is pulling a 500 kg car out of the mud with a force of 3000 N. With what magnitude of force does the car pull back on the car?

A. 3000 N

B. 1500 N

C. 300 N

D. 0 N

The magnitude of force with which the car pulls back on the truck is equal to the force exerted by the truck on the car, which is 3000 N. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. Therefore, the car exerts a force of 3000 N in the opposite direction to the force exerted by the truck.

Explanation

The magnitude of force with which the car pulls back on the truck is equal to the force exerted by the truck on the car, which is 3000 N. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. Therefore, the car exerts a force of 3000 N in the opposite direction to the force exerted by the truck.

4. The mass of a bowling ball is 3 times the mass of a bowling pin. When the ball collides with the pin, it exerts a force of 24 N on the pin. What is the reaction force the pin exerts on the ball?

A. 72 N

B. 24 N

C. 8.0 N

D. 6.0 N

When the ball collides with the pin, according to Newton's third law of motion, the pin exerts an equal and opposite force on the ball. Therefore, the reaction force the pin exerts on the ball is also 24 N, which is the same as the force exerted by the ball on the pin.

Explanation

When the ball collides with the pin, according to Newton's third law of motion, the pin exerts an equal and opposite force on the ball. Therefore, the reaction force the pin exerts on the ball is also 24 N, which is the same as the force exerted by the ball on the pin.

5. Nadeen who weighs 600 N, is standing on the ground. According to Newton's third law, every action has a reaction. What is the reaction force to Nadeen's weight?

A. The 600 N gravitational force exerted by Nadeen on Earth.

B. The 600 N contact force exerted by Nadeen on Earth.

C. The 600 N contact force exerted by Earth on Nadeen.

D. The 600 N gravitational force exerted by Earth on Nadeen.

According to Newton's third law, every action has an equal and opposite reaction. In this case, the action is Nadeen's weight of 600 N exerted on the Earth. The reaction force to this action is the contact force exerted by the Earth on Nadeen. Therefore, the correct answer is c. The 600 N contact force exerted by Earth on Nadeen.

Explanation

According to Newton's third law, every action has an equal and opposite reaction. In this case, the action is Nadeen's weight of 600 N exerted on the Earth. The reaction force to this action is the contact force exerted by the Earth on Nadeen. Therefore, the correct answer is c. The 600 N contact force exerted by Earth on Nadeen.