1st Law of Motion Inertia

A bowling ball sitting motionless on a table exerts a downward force on the table. The force exerted by the table must be

• equal to the force of the ball

• greater force of the ball

• less force of the ball

• all of the above

Tags

NGSS.HS-PS2-1

A person is traveling in a car, and the car comes to a sudden stop. Seat belts are important in car safety because they prevent the person's forward motion due to

• inertia

• unbalanced force

• balanced force

• mass

To move a refrigerator, forces are applied as shown. Which of these statements best describes what will happen if the forces applied at exactly the same time?

• The refrigerator will move left, because of the greatest force on the right.

• The refrigerator will move right, because the force is greater over the surface area.

• The refrigerator will remain in place because the forces are not enough to move a refrigerator.

• The refrigerator will remain in the same place, because the net force is zero.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Once a rocket is in orbit which of Newton's Laws explains why the rocket can travel in space in the same direction at a constant speed without engine power?

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Newton's 4th Law

What relationship exists between mass and inertia?

• As mass increases, inertia decreases.

• As mass increases, inertia increases.

• Mass cancels the property of inertia.

• Mass stabilizes the property of inertia.

A rocket in space can travel without engine power at constant speed in the same direction. Which concept explains that phenomenon?

• acceleration

• action-reaction

• gravitation

• inertia

A teenager is driving a car with her textbook on the seat beside her. She slams on the brakes bringing the car to a quick stop. However, the book slides forward off the seat onto the floor. What property is the book demonstrating as it slides off the seat?

• friction

• gravity

• inertia

• mass

Juanita is driving a car. When Juanita presses the brakes to slow down, her body experiences forward motion. Why does Juanita's body move forward while pressing on the brakes?

• due to unequal and opposite force on the car and her body is coming to rest

• due to unbalanced force on her body and her body is coming to rest

• due to inertia and her body continues to be in state of motion

• due to unbalanced force on her car and her body is coming to rest

A person is traveling in a car, and the car comes to a sudden stop. Seatbelts are important because they prevent the person's forward motion due to

• friction

• gravity

• inertia

• vibrations

During magic show, the magician quickly pulls a table cloth off of a table set without disturbing the dishes. What law explains this?

• Law of gravitation

• 1st law of motion

• 2nd law of motion

• 3rd law of motion