The three types of pulleys are fixed, movable and combined. These simple machines consist of a wheel used in combination with a rope, cord, cable, chain or belt and are typically employed to lift heavy objects.Know More
When a fixed pulley is used individually, the effort required to lift a load is greater than the weight of the load itself. However, lifting with a pulley is easier than lifting without it because the pulley changes the direction of the force. For example, when a single fixed pulley is anchored to a ceiling, the person using it raises an object by pulling down instead of pushing up and may be able to take advantage of his weight for additional leverage.
Movable pulleys adjust with their loads, so the effort required for lifting is less than the weight of the lifted objects. Their disadvantage is that the user must pull or push the pulley up or down.
The benefit of combined pulleys is that the effort required for lifting is less than half the weight of the raised objects. However, their drawback is that the user must pull the rope a longer distance than with other types to lift the object a given amount. Also, combined pulleys generally require users to apply force for greater durations of time.Learn more about Motion & Mechanics
There are three basic types of motion: translational, rotational and oscillatory. Translational motion results in a change of location, rotational can occur in anything from a fan moving in a circle to the rotation of the planets around the sun and oscillatory motion is repetitive, an example being the pendulum on a clock.Full Answer >
The different types of capacitor include ceramic, electrolytic , film, supercapacitors and glass capacitors. The main difference between the types is the material used to make the dielectric.Full Answer >
A movable pulley is a pulley that can freely move. This is only one of three types, the other two being fixed and compound pulleys. Examples of movable pulleys are elevators.Full Answer >
Some examples of pulleys are cranes and flagpoles. Both cranes and flagpoles have a pulley at the top of their poles.Full Answer >