Friction, Gravity and Forces Challenge

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

• similar
• opposite
• parallel
• west

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

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

 What is the unit called that measures force?

• weight
• meter
• Newton
• kilogram

How does friction affect speed?

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

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is static friction?

• the friction between two objects that are not moving

• friction between a rolling object and the surface that it is rolling on

• friction is friction where an object rubs against another surface

• friction of something going through any type of liquid or air

What is rolling friction?

• friction between two surfaces that aren't moving relatively to each other

• friction between a rolling object and the surface that it is rolling on

• friction where an object rubs against another surface

• friction of something going through any type of liquid or air

A boat going through the surface of a lake is an example of which type of friction?

• rolling

• emotional

• sliding

• fluid

What is fluid friction?

• friction is friction between two surfaces that aren't moving relatively to each other

• friction between a rolling object and the surface that it is rolling on

• friction where an object slides rubs against another surface

• friction of something going through any type of liquid or air