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What is the mechanical advantage of a Class 1 lever? -
ANSWER-It may be
greater than or less
than 1
Class 2 Lever - ANSWER-Resistance in the middle.
Effort is applied on one side of the resistance and the fulcrum
is located on the
other
side.
Examples of Class 2 levers: - ANSWER-Wheel barrow, a
nutcracker, a bottle
opener or the brake pedal
of a car
, What is the mechanical advantage of a Class 2 lever? -
ANSWER-It is always
greater
than 1
Class 3 Lever - ANSWER-Effort in the middle
The resistance is on one side of the effort and the fulcrum is
located on the
other
side.
Examples of Class 3 levers - ANSWER-tweezers or the human
mandible
Mechanical advantage is always less than 1
FRE 123 - ANSWER-Fulcrum in middle for
1st class
Resistance is in the middle for the
2nd lever
Effort is in the middle for
the 3rd
HEAD - ANSWER-pressure created by the force of gravity and
is a function of
the difference in elevation between intake
and output