Wheels and Rollers

Why do rollers make it easier to pull or push an object?

• By making it have MORE friction

• By making it have LESS friction

• Because they have a cool shape

• They don't!

What do rollers and wheels have in common?

• they both increase the force needed to move objects

• they both are not attached

• they both have an axle

• they are both shaped like a cylinder

True or False? wheels and rollers can come in different sizes.

• True

• False

What is this called?

• Roller

• Wheel

• Wheel and axle

• Pulley

What is this called?

• A roller system

• A wheel and axle

• A brown cart

True or False? Rollers are attached to what they are moving.

• True

• False

True or false? The following are all examples of wheels: Gears, pulleys, rollers

• True

• False

A wheel is a simple machine that makes our lives ______.

• fun

• hard

• easier

• complex

This is a real life example of a ______

• Pulley

• Roller

• Wheel and axle

• Hot dog