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Pulleys
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What type of pulley is a CRANE?
Combination
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What type of pulley is a WINDOW SHADE / BLINDS?
Fixed
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In theory, lifting takes the same effort as lifting without the pulley. In practice, effort must be greater than load.
Fixed.
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Two or more sets of pulleys connected by the same rope. Upper set doesn't move, lower set does.
Combination
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Load moves the same distance that the rope is pulled by the effort.
Fixed.
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The load moves half the distance that the rope is pulled by the effort.
Moveable
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One pulley supports the load with 2 ropes. Mechanical Advantage = 2
Moveable
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Number of rope segments determines the Mechanical Advantage.
Combination
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What kind of pulley is a CLOTHESLINE?
Fixed
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Distance the load moves comparison to the applied effort force will depend on the number of pulleys
Combination
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Pulley and load move when rope is pulled.
Moveable.
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What kind of pulley is a FLAG POLE?
Fixed
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Effort is always applied by pulling down, to work with force of gravity
Fixed or Combination
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What type of pulley is a GARAGE DOOR MECHANISM?
Moveable
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Doesn't move when rope is pulled; rotates in place.
Fixed
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Lifting requires less force than without pulley, but it must be applied over a greater distance.
Moveable
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Fixed to a supporting structure. Not directly attached to the load.
Fixed.
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Effort is applied by pulling up.
Moveable
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Less and less effort is required to lift heavy loads as more pulleys are added.
Combination
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Attached directly to the load being lifted.
Moveable
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What type of pulley is on a SAIL BOAT?
Moveable
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Load is supported with one rope. Mechanical Advantage = 1
Fixed
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