Friction and Gravity

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

• similar
• opposite
• parallel
• west

Rougher surfaces have ...

• greater friction
• less friction
• the same level of friction

How does friction affect speed?

• more friction decreases speed
• more friction increases speed
• less friction decreases speed
• less friction doesn't affect speed

without friction, an object in motion would never stop

• true

• false

Tags

NGSS.HS-PS2-1

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

• Force and roughness between surfaces
• hills and valleys and how smooth or rough the surface is
• Amount of force and amount of surface the comes in contact
• The force and the weight exerted on the surfaces

Haley is standing outside in the cold weather waiting for her bus. How can she create heat with her hands?

• Wave her hands in the air

• Rub her hands together

• Cover her hands in a towel

• Wash her hands with water

Tags

NGSS.MS-PS3-5

Wesley is bored during class and begins rubbing his pencil eraser on the desk. He notices he created energy. What kind of energy can be created by rubbing an eraser on a desk?

• electric energy

• heat energy

• light energy

• magnetic energy

Tags

NGSS.MS-PS3-5

Which of these increases the friction of someone walking on the floor?

• sand paper

• grease

• oil

• banana peel

What is it called when something dissolves into something else?

• liquidity

• density

• viscosity

• solubility

What is anything that takes up space?

• matter

• force

• friction

• mass

Tags

NGSS.MS-PS1-5