PS: Chapter 3 Section 2

Circle the answer that correctly completes each sentence. 1. (Balanced, Unbalanced) forces combine to create a net force of zero.

• Balanced

• Unbalanced

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NGSS.MS-PS2-2

Force is the cause of a change in

• motion

• friction

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NGSS.MS-PS2-2

The force of attraction between any two objects that have mass is called

• acceleration

• gravity

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NGSS.MS-PS2-4

All the forces acting on an object make up (net, friction) force.

• net

• friction

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NGSS.MS-PS2-2

(Balanced, Unbalanced) forces combine to create a net force greater than zero.

• Balanced

• Unbalanced

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NGSS.MS-PS2-2

True/False. Decide if each statement is true or false, and write true or false in the blank. 6. Forces act on an object at all times.

• True

• False

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NGSS.MS-PS2-5

When an object is not moving, forces are not acting on it.

• True

• False

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NGSS.HS-PS2-1

An object will accelerate in the direction of the stronger unbalanced force.

• True

• False

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NGSS.MS-PS2-2

Friction is a force that resists the movement of one surface against another.

• True

• False

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NGSS.MS-PS2-2

An ice skater can glide because there is a lot of friction between the ice skates and the ice.

• True

• False

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NGSS.3-PS2-1