Fixed Pulley Movable Pulley Block and Tackle

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Presentation transcript:

Fixed Pulley Movable Pulley Block and Tackle Pulleys Fixed Pulley Movable Pulley Block and Tackle

What is a Pulley? Pulleys are a kind of simple machine that consists of a rope that fits onto a wheel and changes the direction of a force. There are three kinds of pulleys. Fixed Pulley Movable Pulley Block and Tackle (combo of fixed and movable)

Fixed Pulley Wheel attached to surface Changes the direction of the applied force NO mechanical advantage – same amount of force is required

Movable Pulley Pulley moves along the rope Wheel supports the load Effort is in the same direction as movement Reduces the forces needed to move an object

Block and Tackle Has at least two wheels (one movable and one fixed) The more complex the pulley, the more the effort needed to move the object decreases

Common Examples Of Pulleys