Unit 2 Module 3 Forces Review

Suppose Earth’s mass increased but Earth’s diameter did not change. How would the gravitational strength near Earth’s surface change?

• Since mass increased gravitational strength would increase.

• Since the diameter remained the same gravitational strength would remain the same.

• Since mass increased gravitational strength would decrease.

Tags

NGSS.MS-PS2-4

Friction is best demonstrated in which example?

• an ice-skater sliding across the ice without noticeably slowing down

• a vehicle rolling to a stop at a stop light

• a baseball moving in a projectile motion

Tags

NGSS.MS-PS3-5

_______ forces are force that cancel each other and have a zero net force.

• Unbalanced

• Balanced

• Opposite

On Earth, what is the weight of a large-screen TV that has a mass of 80 kg and the acceleration due to gravity is rounded to 10 m/s² ? [ F = m x a ]

• 8 N

• 800 N

• 80 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Two students push on a box in the same direction, and one student pushes in the opposite direction. What is the net force on the box if each student pushes with a force of 10 N?

• 10 N

• 20 N

• 30 N

Tags

NGSS.MS-PS2-2

The graph shows how the speed of a book changes as it slides across a table in a straight line. Over what time interval is the net force on the book in the opposite direction of the book's motion?

• 0 s to 0.5 s

• 0.5 s to 2.4 s

• 0 s to 2.4 s

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

What happens to acceleration when force is increased?

• It decreases.

• It increases.

• It stays the same.

Tags

NGSS.MS-PS2-2

A student pushes on a 2 kg box with a force of 10 N forward. The force of sliding friction is 2 N backward. What is the acceleration of the box? [ a = F_net / m ]

• 6 m/s²

• 4 m/s²

• 2 m/s²

Tags

NGSS.MS-PS2-2

The force of gravity _____ the force of air resistance when a falling object reaches terminal velocity.

• is greater than

• is less than

• equals

When an object moves in a circular path, the net force is called __________.

• centripetal force

• microwelds

• friction