Wheel and axle, gears

A simple machine that provides a mechanical advantage . Consists of a wheel and an axle.

• Wedge

• Lever

• Wheel and axle

As the wheel radius increases, the effort needed to turn the wheel ______.

• increases

• decreases

• does not change

Gears that are next to each other turn in opposite directions.

In this manner, gears change the direction of the force applied (effort)

• True

• False

• Not sure

Gears can produce a faster or slower movement.

This depends on the number of teeth a gear has.

• True

• False

• Maybe

__________ are wheels with teeth on them.

A smaller gear has fewer teeth so it turns _____.

When two gears are meshed together, the gear with more teeth will turn ______ than the gear with fewer teeth.

• faster

• slower

• at the same speed