Notes for A3.3.7 Pulley systems - IB | RevisionDojo
A3.3.7 Pulley systems Notes
Pulley Systems
Definition
Pulley
A grooved wheel that uses a rope, cord, chain, or cable to transmit energy and motion.
Pulley system (BBC)
Components of Pulley Systems
Pulley Wheel: A circular disc with a grooved rim to hold a rope or belt.
Rope or Belt: Connects the pulleys and transmits force.
Axle: The shaft on which the pulley wheel rotates.
Frame or Housing: Supports the pulley and keeps it aligned.
Types of Pulley Systems
Fixed Pulley
Definition
Fixed Pulley
A pulley that is attached to a fixed support and changes the direction of force without altering the mechanical advantage.
Function: Changes the direction of the force applied.
Example: Flagpoles use fixed pulleys to raise and lower flags.
Flagpoles with a fixed pulley systemNote
A fixed pulley does not reduce the amount of force needed to lift a load, it only changes the direction of the force.
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What is a pulley?
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Note
Pulley Systems
A pulley is a grooved wheel that uses a rope, cord, chain, or cable to transmit energy and motion.
Components of Pulley Systems
Pulley Wheel: A circular disc with a grooved rim to hold a rope or belt.
Rope or Belt: Connects the pulleys and transmits force.
Axle: The shaft on which the pulley wheel rotates.
Frame or Housing: Supports the pulley and keeps it aligned.
AnalogyThink of a pulley as a wheel with a built-in track that guides the rope, just like a train track guides a train.
