Fixed Pulley Definition And Principle

definition
When using pulleys, the pulley whose shaft position is fixed is called a fixed pulley.
principle
When in use, the position of the pulley is fixed; the fixed pulley is essentially an equal-arm lever, which is effortless and effortless, but can change the direction of the force. The power arm and resistance arm of the lever are the radius of the pulley respectively. Since the radius is equal, the power The arm is equal to the resistance arm, and the lever is neither effortless nor laborious. Use the principle of leverage
Features
Fixed pulleys cannot save effort, and when the weight of the rope and the friction between the rope and the pulley are ignored, the force used to lift the heavy object is the same no matter where the force of the string is directed, because the power arm and the resistance arm are both Equal and equal to the radius of the pulley.