8th Review Quiz (Unit 8)

Acceleration is a push or pull on an object.

• TRUE

• FALSE

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NGSS.MS-PS2-1

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If two forces are going in the same direction, you must ___ the forces.

• subtract

• divide

• add

• multiply

Tags

NGSS.MS-PS2-2

What type of force does one object apply to another without touching it?

• Normal Force

• Contact Force

• Noncontact Force

• Collision Force

Tags

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Which force always opposes motion between surfaces that are touching?

• Normal Force

• Collision Force

• Elastic Force

• Friction

An object at rest or not in motion is considered a(n) ___ force.

• balanced

• unbalanced

• collision

• noncontact

What SI unit is used to measure force?

• m/s

• m/s²

• seconds (s)

• Newtons (N)

Which force always opposes gravity?

• Friction

• Elastic Force

• Normal Force

• Collision Force

At what constant rate do objects in freefall fall on Earth?

• 9.8 m/s²

• 98 m/s²

• 24 m/s²

• 1.6 m/s²

Tags

NGSS.MS-PS2-4

Two basketball players grab the basketball at the same time. Player one pulls the ball right with a force of 50 N, while player two pulls the ball left with a force of 50 N. What is the net force, and which player will get the ball?

• 0 N; Player one will get the ball.

• 100 N; Player one will get the ball

• 100 N; Neither player gets the ball

• 0 N: Neither player gets the ball

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A boy pulls a bike with a force of 12 N east as another boy pushes the bike with a force of 4 N east. What is the net force, and what direction does the the bike move?

• 8 N; east

• 16 N; east

• 8 N; west

• 16 N; west

Tags

NGSS.MS-PS2-2