what is a pulley and what is wheel and axel
Answers
Answer:
Pulley is used to change the direction of a rope or a chain. The actual rotation of the pulley wheel is a side effect. Wheel and axle are used to amplify rotational force. The force can be provided through a rope wrapped around the wheel, but the change of direction is a side effect.
Pulley:c
A pulley is a wheel used to transmit power and motion by means of band, rope, belt, cord or chain passing over its rim. Pulley with grooved rims are called sheaves.
In belt drive, pulleys are fixed to the shaft at their axes and power is transmitted between the shafts ,belts running over the pulley.
eg,. Elevators, wells, exercise equipments.
Types of pulley:
- Fixed pulley; are a very common pulley.
- Movable pulley; are yet another type of pulley.
- Compound pulley; are the system are combination of both movable and fixed.
Wheels:
A wheels and axle is made up of circular frame that revloves on a shaft or rod. It is earliest form it was probably used for raising weights or water buckets from wells.
Its principle of operation is explained by way of a device with a large gear and a small gear attached to the same shaft.