Question 1

According to Newton's third law, what happens when you push against a wall with a force $$F$$?

Accepted Answer

The wall pushes back on you with a force equal to $$F$$ but in the opposite direction.

Question 2

A book rests on a table. Which of the following best describes the interaction between the book and the table according to Newton's third law?

Accepted Answer

The book exerts a downward force on the table, and the table exerts an upward force of equal magnitude on the book.

Question 3

A person stands on a skateboard and pushes against a wall. What happens to the person and why?

Accepted Answer

The person moves away from the wall because the wall exerts an equal and opposite force on them.

Question 4

Which of the following statements best illustrates Newton's third law in the context of gravity?

Accepted Answer

The Earth and the Moon pull on each other with forces of equal magnitude and opposite direction.

Question 5

If a car crashes into a wall, which force pair is described by Newton's third law?

Accepted Answer

The force of the car on the wall and the force of the wall on the car.

Question 6

A swimmer pushes water backward with her hands. According to Newton's third law, what is the reaction force?

Accepted Answer

The water pushes the swimmer forward with an equal force.

Question 7

Two ice skaters push off from one another. If skater A has twice the mass of skater B, which statement is true about the forces they exert on each other?

Accepted Answer

They exert equal and opposite forces on each other.

Question 8

A rocket launches by expelling gas downward. According to Newton's third law, what is the force that propels the rocket upward?

Accepted Answer

The upward reaction force from the expelled gas.

Question 9

Which of the following is NOT an example of a Newton's third law force pair?

Accepted Answer

The normal force of the table on a book and the gravitational force of the Earth on the book.

Question 10

A person jumps off a boat and the boat moves in the opposite direction. Which law explains this motion?

Accepted Answer

Newton's third law

Question 11

A box is at rest on a horizontal surface. Which of the following pairs are Newton's third law force pairs?

Accepted Answer

The force of the box on the Earth and the force of the Earth on the box.

Question 12

A person pulls a sled with a rope. Which force is the Newton's third law pair to the force of the rope on the sled?

Accepted Answer

The force of the sled on the rope.

Question 13

If you drop a ball and it bounces off the ground, which force pair is described by Newton's third law during the bounce?

Accepted Answer

The force of the ground on the ball and the force of the ball on the ground.

Question 14

A satellite orbits Earth due to gravity. According to Newton's third law, what is the reaction force to Earth's gravitational pull on the satellite?

Accepted Answer

The satellite's gravitational pull on Earth.

Question 15

A person is standing on the floor. Which of the following is the Newton's third law pair to the normal force exerted by the floor on the person?

Accepted Answer

The normal force exerted by the person on the floor.

Newton's Third Law and Interactions Between Objects

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