Belts and gearsConsider 2 wheels of the same mass but different radius

connected by a belt or chain

Little left Wheel

Choose < = >

Big right wheel

I I

V at a V at b

ω ω

α α

Tension at a Tension at b

Torque at a Torque at b

ab

Realize that for every one spin of the big wheel, the little wheel spins ____________.

Belts and gearsConsider 2 wheels of the same mass but different radius

connected by a belt or chain

Little left Wheel

Choose < = or > Big right wheel

I I

V at a V at b

ω ω

α α

Tension at a Tension at b

Torque at a Torque at b

ab

<=

>

>

=

<

Realize that for every one spin of the big wheel, the little wheel spins

twice.

Little left gear Choose < = > Big right gear

V at a V at b

ω ω

α α

Force of left tooth on right tooth

Force of right tooth on left tooth

Torque at a Torque at b

a

b

What is a Gear Box?