Ch 2: Lesson 2 Review

To find the net force, you do not need to specify the direction in which each force acts.

• True

• False

Tags

NGSS.MS-PS2-2

According to Newton's first law, the motion of an object does not change if the net force acting on it is zero.

• True

• False

Tags

NGSS.HS-PS2-2

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

• True

• False

Inertia is two or more forces acting in opposite directions.

• True

• False

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

• negative forces

• balanced forces

• unbalanced forces

Which term explains why a crash-test dummy lunges forward during a car crash?

• inertia

• gravity

• velocity

What happens to an object at rest if balanced forces act upon it?

• The object remains at rest.

• The object begins to move at a constant speed.

• The object begins to move and then slows down.

Tags

NGSS.MS-PS2-2

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?

• 20 N

• -20 N

• 110 N

Tags

NGSS.MS-PS2-2

Forces acting on an object cannot be added.

• True

• False

Tags

NGSS.MS-PS2-2

What causes an object in motion to stay in motion?

• gravity

• velocity

• inertia

• a really good push or pull