Grade 8 Test 1 Review

To make an object move you must first apply ---

• an opposing force

• an unbalanced force

• a stationary force

• a vertical force

Tags

NGSS.MS-PS2-2

A student pushes against a wall with 20 N of force and the wall does not move. In this situation, the wall exerts --

• 0 N of force

• less than 20 N of force

• 20 N of force

• more than 20 N of force

Which law explains the relationship among mass, force and acceleration?

• Universal Law of Gavitation

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Newton's Third Law of Motion

Tags

NGSS.MS-PS2-2

In the diagram below, a girl sits on a sled and slides down a hill of snow. Which arrow represents the force of friction opposing the motion of the sled down the hill?

• Arrow A

• Arrow B

• Arrow C

• Arrow D

Tags

NGSS.MS-PS2-2

a force is best defined as ---

• the application of weight

• a push or pull that is exerted on matter

• the flow of electric charges

• a bond in which electrons are shared

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of these examples best illustrates Newton's Second Low of Motion?

• A 100 Ib boy has twice as much inertia as a 200 Ib boy.

• A truck needs a more powerful engine than a small car.

• A hockey puck slides easily across the ice.

• A satellite stays in orbit for a long time.

Tags

NGSS.MS-PS2-2

According to Newton's Third Law of Motion, if Mike pushes down on the springboard to being his dive, what is the reaction force?

• Mike splashing into the water

• The springboard pushing Mike into the air

• The height of the water when Mike enters the water

• The sound the board makes as he pushes into the air

Tags

NGSS.MS-PS2-1

Ana pushed on a big rock in her back yard. She was unable to get it to move because she did not -

• apply enough force

• have a good grip on the rock

• have enough mass

• weigh enough

Tags

NGSS.MS-PS2-2

In a head-on collision, a person who is not wearing a seat belt continues to move forward at the original speed of the car because of -

• weight

• mass

• gravity

• inertia

Tags

NGSS.HS-PS2-1

If I kick a soccer ball across the field, what vocabulary word tells me why the ball would slow down in the grass?

• acceleration
• friction
• gravity

Tags

NGSS.MS-PS3-5