MECHANISMS

Lever

Platform for

Effort

Load

Pivot/Fulcrum

For rotation

Middle

Pulley

String/Belt

Pull/Bring load

Up easily

Down easily

Wheel

Rotation

Groove along edge for

String

Belt

User

Friendly

Safe

Thoughts

Safe

Easy to use

Advantages

Less effort

Reduce time spent

Move a large load with a small effort

Metal mechanisms

Scissors

Screws

Turn rusty

Stiff

Hard to use

Knifes

Sharp

Hurt user

Saws

Inclined planes

Travel long

Distances

Time