Definition of silent antirust bearing in shower room
The fixed pulley is essentially an equal arm silent antirust bearing in shower room lever
When using a pulley, the pulley whose position of the shaft 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 labor-saving and effortless, but it can change the direction of the force The power arm and resistance arm of the lever are the radius of the pulley respectively. Because the radius is equal, the power arm is equal to the resistance arm. The lever is neither labor-saving nor laborious. Using the lever principle, the formula is deduced as follows (F is the pull force, G is the gravity of the object, L1L2 is shown in the figure):
characteristic
The fixed pulley cannot save labor, and when the rope weight and the friction between the rope and the pulley are ignored, the force used to lift the heavy object is equal no matter where the force direction of the thin rope is, because the power arm and the resistance arm silent antirust bearing in shower room are equal and equal to the radius of the pulley.
