Types of Force

The amount of friction depends on the weight of the objects pressing together.

• True
• False

Which of the following is an example of friction that is helpful?

• Brakes used on a bike
• Tires from a car on the road
• Tread on the bottom of your shoes
• All are examples that are helpful

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

Tags

NGSS.MS-PS2-2

without friction, an object in motion would never stop

• true

• false

Tags

NGSS.MS-PS2-2

you can walk because there is friction between your __________ and ______________

• ground and air

• feet and ground

• feet and air

• air and ground

Tags

NGSS.3-PS2-1

In which of these examples is friction helpful:

• soil erosion

• engine parts wearing out

• breaks stopping a car

• holes developing in your socks

What force ultimately slows the roller coaster to a stop?

• Applied

• Normal

• Friction

• Gravitational

Tags

NGSS.MS-PS2-2

What force holds the planets in motion around the sun?

• Magnetic
• Electrical
• Gravitational
• Air Resistance

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-2

How would the absence of friction affect a marble traveling on a long, straight path?

• The marble’s speed would decrease.
• The marble’s speed would increase.
• The marble would stop immediately. 
• The marble would remain at constant speed.

Tags

NGSS.MS-PS2-2