GRAVITATIONAL AND FRICTIONAL FORCES - review

A push or a pull action upon an object is called as ...

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NGSS.MS-PS2-1

What are 2 factors that determine the amount of friction between 2 objects?

• mass of the box and roughness between surfaces

• hills and valleys and how smooth or rough the surface is

• Amount of force and amount of surface that the object comes in contact

• The force and the weight exerted on the surfaces

What is the unit called that measures force?

• weight

• meter

• newton

• kilogram

The gravitational force exerted by an object depends on its

• volume

• mass

• weight

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NGSS.MS-PS2-4

Which of the following causes a change in motion?

• balanced forces

• either balanced or unbalanced forces

• unbalanced forces

• any combination of forces

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NGSS.MS-PS2-2

Rougher surfaces have ...

• greater friction

• lesser friction

• the same level of friction

In this force diagram, which arrow is representing Friction?

• A

• B

• C

• D

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NGSS.MS-PS2-2

When placed at equal distances apart, the greatest gravitational attraction will be between two

• skateboards

• bowling balls

• school buses

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NGSS.MS-PS2-4

Friction is a force that acts in an ___________ direction of movement.

• similar
• opposite
• parallel
• west

The use of lubricants in motor vehicles ______________

the excessive frictional force in the engine

compartment.

• reduces

• increases

• reuses

• enlarge

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NGSS.MS-ETS1-1