Which law describes what happens when the forces on an object are balanced?(1 point)
Responses
Newton’s third law of motion
Newton’s third law of motion
Newton’s second law of motion
Newton’s second law of motion
Newton’s First Law of Motion
Newton’s First Law of Motion
The principle that rest is the natural state of objects.
Newton’s First Law of Motion
Which is an example of uniform motion, as used in Newton’s First Law?(1 point)
Responses
An air hockey puck slows when the air cushion is turned off.
An air hockey puck slows when the air cushion is turned off.
An air hockey puck accelerates when a player hits it.
An air hockey puck accelerates when a player hits it.
An air hockey puck slides across a table at constant speed.
An air hockey puck slides across a table at constant speed.
An air hockey puck bounces off a wall.
An air hockey puck slides across a table at constant speed.
Which law would be modeled by the image on the left?
Illustration of a person sitting in an ejector seat. In the first image the upward push of the chair and downward pull of gravity are equal, and the person is at rest. In the second image the upward push of the chair is greater than the downward pull of gravity, and the person accelerates upward?
Source: Ruth Thomlevold. NB Illustration. Pearson Education Ltd
(1 point)
Responses
Rest is the natural state of an object.
Rest is the natural state of an object.
Newton’s Second Law
Newton’s Second Law
Newton’s Third Law
Newton’s Third Law
Newton’s First Law
Newton’s Second Law
The dogsled in the image moves at a constant speed in a straight line. Which of the following is true?
A team of dogs pulls a dogsled across level, snow-covered ground.
Source: Pi-Lens. Shutterstock
(1 point)
Responses
There is not enough information to answer the question.
There is not enough information to answer the question.
The forward pull of the dogs balances the backward pull of friction.
The forward pull of the dogs balances the backward pull of friction.
The backward pull of friction is larger than the forward pull of the dogs.
The backward pull of friction is larger than the forward pull of the dogs.
The backward pull of friction is smaller than the forward pull of the dogs.
The forward pull of the dogs balances the backward pull of friction.
Carla demonstrates Newton’s First Law of Motion by slowly pushing a book across a table. The book moves at a constant rate of speed so long as she is pushing it. Which of the following is NOT true?(1 point)
Responses
The upward force exerted by the table balances the book’s weight.
The upward force exerted by the table balances the book’s weight.
Her push balances the force of friction.
Her push balances the force of friction.
There is an unbalanced force on the book, acting in the direction of motion.
There is an unbalanced force on the book, acting in the direction of motion.
The forces acting on the book are all balanced.