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Atwood's Machine and Pulleys

Atwood's Machine

A simple pulley problem is illustrated, with two masses hanging from a frictionless pulley.

An Atwood's Machine consists of two masses connected by a string that passes over a pulley. It is used to demonstrate principles of classical physics. A practical example of an Atwood's machine is an elevator.


A pulley is a wheel on an axle. The direction of motion of a string or cable is changed by passing the string or cable over the circumference of the pulley.

Atwood's Machine and/or Pulleys in Physics Problems

Atwood Machine and Pulley Problems

Conservation of Energy

Rotational Motion and Pulleys

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