MECHANISMS

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WORLD ENVIRONMENT DAY

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MECHANISMS

PROBLEMS

Inclined planes

Travel long

Time

Distances

Metal mechanisms

Saws

Knifes

Sharp

Hurt user

Turn rusty

Stiff

Hard to use

Screws

Scissors

NEEDS

Move a large load with a small effort

User

Thoughts

Advantages

Reduce time spent

Less effort

Easy to use

Friendly

Safe

Pulley

Groove along edge for

Belt

String

Wheel

Rotation

String/Belt

Pull/Bring load

Down easily

Up easily

Lever

Pivot/Fulcrum

Middle

For rotation

Platform for

Load

Effort