TECHNOLOGY: SIMPLE MACHINES AND MECHANISMS

Hello,

Today I will talk about simple machines and mechanisms, that we have work in this unit.

What are simple machines? make work easier for us by allowing us to push or pull over increased distances.

There are 6 types of simple machines:

1: The inclined plane: A flat surface or plane that is slanted, or inclined, so it can help move objects across distance. A common inclined plane is a ramp.

2:Lever: A lever is a stiff bar that rests on a support called a fulcrum which lifts or moves loads.

3: Screw: A screw is an inclined plane wrapped around a pole which holds things together or lifts materials.

4: Pulley: A pulley is a simple machine that uses grooved wheels and a rope to raise, lower or move a load.

5: Wheel and axle: A Wheel with an axle through its center lifts or moves loads.

6: Wedge: A wedge is an object with at least one slanting side ending in a Sharp edge, which cuts material apart.

In our daily life we use a lot of simple machines such as the wheels cars, a knife, a door handles etc.

TRANSMITION OF MOVEMENT

Rotary motion is turning round in a circle, such as a wheel turning.

Linear motion is moving in a straight line, such as on a paper trimmer.

Reciprocating motion is moving backwards and forwards in a straight line, as in cutting with a saw.

Oscillating motion is swinging from side to side, like a pendulum in a clock.

MINDOMO de simple machines

We also have study the mechanisms

What are mechanisms? Mechanisms are objects that make it easier for people to do work.

Mechanisms are formed by:

Resultado de imaxes para parts of mechanisms cams

-Cams: Is a rotation or sliding pice as an eccentric wheel or a cylinder with an irregular shape, in a mechanical linkage used especially in transforming rotary motion into linear motion or in the opposite side.

There are differents types of cams:

Circular cam

Pear cam

Snail cam

Four-lobed cam.

-Gears: Is the part of an engine that chanes enginepower into moviment.