8th Grade- Chapter 3 Test Review

A baseball has an approximate mass of 0.15 kg. If a bat strikes the baseball with a force of 6 N, what is the acceleration of the ball?

• 4 m/s²

• 6 m/s²

• 40 m/s²

• 60 m/s²

Tags

NGSS.MS-PS2-2

The person in the diagram above is unable to move the crate from its position. Which is the opposing force?

• gravity

• normal force

• sliding friction

• static friction

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

The mass of a person on Earth is 72 kg. What is the mass of the same person on the Moon where gravity is one-sixth that of Earth?

• 12 kg

• 60 kg

• 72 kg

• 432 kg

Tags

NGSS.MS-PS2-4

A swimmer pushing off from the wall of a pool exerts a force of 1 N on the wall. What is the reaction force of the wall on the swimmer?

• 0 N

• 1 N

• 2 N

• 10 N

Tags

NGSS.MS-PS2-1

Which term applies to the forces in the diagram above?

• negative

• positive

• reference

• unbalanced

In the diagram, what happens when force K is applied to the crate at rest?

• The crate remains at rest.

• The crate moves back and forth.

• The crate moves to the left.

• The crate moves to the right.

Tags

NGSS.MS-PS2-2

What is another term for change in velocity?

• acceleration

• inertia

• centripetal force

• maximum speed

Tags

NGSS.MS-PS2-2

The person in the diagram is spinning a ball on a string. When the ball is in position X, what is the direction of the centripetal force?

• 1

• 2

• 3

• 4

Which is ALWAYS a contact force?

• electric

• friction

• gravity

• magnetic

When two billiard balls collide, which is ALWAYS conserved?

• acceleration

• direction

• force

• momentum

Tags

NGSS.HS-PS2-2