Newton's First Law Review

If there were no friction, a moving object would keep moving, even if no other force were applied to it.

• True
• False

Is it possible to completely eliminate friction in any system?

• Yes

• No

If one force of 30 N and another force of 85 N result in a net force of 55 N,which term describes the two forces?

• A. negative forces
• B. balanced forces
• C. unbalanced forces

Tags

NGSS.HS-PS2-1

Which of the following statements about inertia is true?

• Inertia only affects objects that are stationary

• Inertia only affects objects that are moving

• Inertia affects objects only when they change speed

• Inertia is a property of all objects with mass

What happens to an object in motion if balanced forces act upon it?

• A. The object continues to move at a constant speed.

• B. The object comes to a stop.

• C. The object accelerates.

Tags

NGSS.HS-PS2-1

If the reference direction is to the left and a force of 45 N acts to the left while another force of 65 N acts to the right, how much net force is acting on the object?

(a)  

Tags

NGSS.MS-PS2-2

Three people push a piano on wheels with forces 75N to the right, 100 N to the left, and 65 N to the right. What are the strength of the net force on the piano?

(a)  

Tags

NGSS.MS-PS2-2

What is the effect of an unbalanced force on an object at rest?

• B. The object starts moving.

• C. The object moves in the opposite direction.

• A. The object remains at rest.

Tags

NGSS.MS-PS2-2

Which of the following is an example of Newton's first law of motion?

• C. A ball rolling down a hill.

• B. A book remaining on a table until someone moves it.

• A. A car accelerating when the light turns green.

How does mass affect the inertia of an object?

• B. More mass means more inertia.

• C. Mass does not affect inertia.

• A. More mass means less inertia.