moments 2 gears and levers

What are levers

Force multipliers used to reduce the size of force needed to move or break smthg

Levers transmit the turning effect of a force

How does a lever work

Use rigid bar and a pivot point called a fulcrum

We apply input for which provides output force somewhere else

If input force (effort) and output force(load) are on different sides of pivot(fulcrum ) they will act in different directions (scissors)

If they act in the same side of the pivot (wheel barrow) they will act in the same direction

Generally where is the output force in regards to the pivot

The output force is generally closer to the pivot than the input force so there will be a larger force

In levers You are able to get a large output force with a relatively small input force

What are gears and how do they work

Gears are wheels with teeth that interlock with each other to transmit a turning force (torque) from one part of a machine to another.

• When one gear turns, its teeth push on the teeth of the next gear, making it turn in the opposite direction.

• The speed and force (moment) of rotation change depending on the size of the gears.