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1st class lever (scissors)


2nd class lever (wheel barrow)


3rd class lever (spade)

Mechanical advantage =
output force/input force
Mechanical advantage (in terms of length)=
input arm length/output arm length
what type of motion does a piston have?
reciprocating
what type of motion does a pendulum have?
oscillating
what type of motion does a fan have?
rotary