Young Engineers Blouberg

LEVERS Levers are used to lift heavy weights with the least amount of effort. In the example opposite, the heavy weight on the left hand side is been lifted by the person because of the lever. The longer the 'rod' the easier it is to lift the weight. Under normal circumstances the person would not be able to lift the weight at all.

10th century The first windmill was seen in Persia. They were used for grinding grain and pumping water to low lying land. Tell me if its too bold and if you can’t read it please

10th century The first windmill was seen in Persia. They were used for grinding grain and pumping water to low lying land. Tell me if its too bold and if you can’t read it please

10th century The first windmill was seen in Persia. They were used for grinding grain and pumping water to low lying land. Tell me if its too bold and if you can’t read it please

LEVERS Levers are used to lift heavy weights with the least amount of effort. In the example opposite, the heavy weight on the left hand side is been lifted by the person because of the lever. The longer the 'rod' the easier it is to lift the weight. Under normal circumstances the person would not be able to lift the weight at all.

Work Work is moving an object over a distance. A machine has one job: to make work easier. Machines are also used to solve human problems. There are complex machines, like a crane. These are machines that use motors to work. They are made of many parts. They often have many moving parts.

Friction Gears (wheels) Wheels that do NOT have teeth. Wheels move because of friction between them. Transmit rotational motion between two or more parts that are close together. Rotational direction reverses in side-to-side contact. Easier to assemble and cost less to make. Disadvantage: Gears tend to slip.

Motion Transmission A) Definition: Relaying the same type of motion from one part of an object to another (rotational to rotational, translational to translational) Motion transmission systems contain: A driver component that initiates the motion At least a driven component that receive the motion and transfers it Some systems might also contain intermediate components between the driver and driven components