Lesson 3- Newton's Three Laws of Motion Quiz

Jessica is comparing two balls. One ball has a mass of 1 kg, and the other has a mass of 2 kg. She pushes each with a force of 100 N. How do the accelerations of the two balls compare?

• The 1 kg ball accelerates the same as the 2 kg ball.

• The 1 kg ball accelerates half as much as the 2 kg ball

• The 1 kg ball accelerates twice as much as the 2 kg ball.

• The 1 kg ball accelerates four times as much as the 2 kg ball.

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A fisherman steps off a boat, which is in the water, onto a dock. What happens?

• The boat and the dock do not move

• The boat moves toward the dock

• The boat moves away from the dock

• The dock moves away from the boat.

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Look at the diagram of forces acting on an object. The picture shows a push and a pull acting on a box of books sitting on the floor. What is the net force toward the right on the box?

• 0 N

• 50 N

• 100 N

• 2,500 N

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When two objects having different masses collide, they move away from each other at different speeds. Which is true of the forces exerted at the moment of impact?

• The forces exerted when they collide are equal and opposing

• The forces exerted when they collide are unequal and opposing.

• The forces exerted when they collide are equal and in the same direction

• The forces exerted when they collide are unequal and in the same direction

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An airplane is traveling at a speed of 200 m/s relative to Earth. A person walks toward the front of the plane at a speed of 1 m/s. How fast is that person traveling in reference to other people on the airplane?

• 0 m/s

• 1 m/s

• 200 m/s

• 201 m/s

Two EQUAL forces act in opposite directions on object A. Two UNEQUAL forces act in opposite directions on object B. If these are the only force acting on objects A and B which of these conclusions is true.

• Only object A will accelerate

• Only object B will accelerate

• Both object A and object B will accelerate

• Neither object A nor object B will accelerate

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The diagram shows the forces acting on a running shoe. As force F is applied the shoe does not move. Which statement describes the forces?

• The net force is acting to the left

• The net force is moving to the right

• The net force is acting in an upward direction

• The net force is zero, and all the forces are balanced

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A 1 kg object accelerates at a rate of 5 m/s^2. Calculate the net force on the object and explain how its motion is changing. 

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Describe the forces that are acting on a person who is standing still on a sidewalk, and identify whether the forces are balanced or unbalanced. Describe how the forces would change if the person started walking.

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Two ice skaters push away from each other. What will be the effect of the forces of their pushing each other if their masses are different?

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