simple machine 2 (gears + wheels and axle)

Gears are wheels with teeth.

• True

• False

A circular object that revolves with or around an axle

• Wheel
• Axle
• Force
• Work

when the wheel turns the axle also turns

• true

• false

one of the following is not an example of wheels and axles

• water faucet

• sharpener

• cross spanner

• axe

in a bicycle, the gears rotate in the same direction

• true

• false

interlocking gears with different number of teeth change the ----------------- of rotation

• direction

• speed

• direction and speed

the effort on the wheel will have to move through a shorter distance

• true

• false

in the following diagram, gear A has 25 teeth and gear B has 75 teeth, how many rotations gear A will make wen gear B make 1 rotation?

• 1

• 2

• 3

• 4

the effort needed gets smaller if the wheel is smaller

• true

• false

which water faucet needs less effort to turn its handle

• tap A

• tap B