Forces and Springs

What type of friction is not moving?

• static
• sliding
• fluid
• rolling

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

• similar
• opposite
• parallel
• west

A type of friction that occurs when air pushes against a moving object causing it to negatively accelerate

• surface area
• air resistance
• descent velocity
• gravity 

How does friction affect speed?

• more friction decreases speed
• more friction increases speed
• less friction decreases speed

Tags

NGSS.MS-PS3-1

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

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

• True
• False

The rougher the surface, the faster an object will travel over the surface.

• True
• False

Which of the following statements is false?

• Friction can only slow things down

• Friction is never useful

• Friction can stop things from moving

What type of Friction is displayed with a bowling ball?

• sliding
• rolling
• static
• There is no friction

What is the standard unit force is measured in?

• Newtons
• pounds
• grams
• meters

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4