4th Post: Machines and mechanisms

We say that a structure is stable when it remains in equilibrium even when a force is applied to it.
The centre of gravity is the point where thr weight of an objet is considered to be concentrated.

• we use the word machine to describe a set ofelements or parts that work together and use energy to perform a task and obtain a result.

• Elements of a machine

Diver element: feeds energy to the machine

Driven element: receives the force produced in the machine.

Converting and transmitting element: transtmits or converts the motion from the driver element to the driven element.

A mechanism is a device that transmit and/or covert motion.
Motion transmission mechanisms: The mechanism is fed energyfrom the driver element and simply transfers it to the driven element. for example: Linear transmission mechanisms
Motion conversion machanisms: The mechanism converts the movement from the driver element into a movement that the driven element can use. for example: Eccentric

                                       Lever

 A lever is a rigid bar that can pivot on a point of support called a fulcrum.

                                          Pulleys

              Pulleys are used to lift heavy loads. They are eheels with a grooved rim.

                   Belt and pulley system

This system is made up of two pulley wheels joined by a belt that slots into the grooved rim of the wheels.

 Gears

A gear is a mechanism consisting of two wheels with teeth. There are gears in the correction tape dispenser