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1
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2
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- A simple machine
- A board or bar that rests on a turning point called the fulcrum
- Used to change the amount, the strength and the direction of movement.
- The position of the force and the load can be changed by moving them to
different points on the lever.
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3
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- The position of the force and the load can be changed by moving them to
different points on the lever.
- An object that a lever moves is called the load or load force.
- The force used to move a lever is called the effort force.
- The closer the object is to the fulcrum, the easier it is to move.
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4
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- The load force and the effort force are separated by the fulcrum
- As one moves up the other moves down.
- The amount and the strength of the movement is depends on the distance
from the fulcrum
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5
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6
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- The load force is between the effort force and the fulcrum.
- This lever uses mechanical advantage to make moving large weights
easier.
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7
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8
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- The effort force is between the fulcrum and the load.
- Mechanical advantage is reduced but more movement is possible.
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9
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10
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Notes
