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MACHINES

MACHINES. SCIENCE YEAR 6. SIMPLE MACHINE. A simple machine is a tool that helps make work easier. Simple machine allow us to use less force to make easier or faster. There are seven kinds of simple machines; 1. Wheel and axle 5. Gear 2. Lever 6. I nclined plane 3. Wedge 7. Screw

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MACHINES

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  1. MACHINES SCIENCE YEAR 6

  2. SIMPLE MACHINE • A simple machine is a tool that helps make work easier. • Simple machine allow us to use less force to make easier or faster. • There are seven kinds of simple machines; 1. Wheel and axle 5. Gear 2. Lever 6. Inclined plane 3. Wedge 7. Screw 4. Pulley

  3. Wheel and Axle • A wheel and axle is made of a rod called the axle, attached to the center of a wheel. • The wheels turn around the axle. • A wheel and axle move or turn an object. • The wheel is usually bigger than the axle. • This can reduce the force needed to do work.

  4. Simple of wheel and axle

  5. Lever • A lever is a simple machine made of a bar. • The lever moves back and forth on a point. The point is called fulcrum. • The fulcrum supports the lever. • Lever helps us to move objects. • The object that we move is called a load. • The force needed to move is called effort.

  6. A lever Load Force Fulcrum

  7. Examples of tools using the lever

  8. A Pulley • A pulley is a rope or chain wrapped around the edges of a wheel. • Pulley move an object up, down or sideways. They help to reduce the amount of force needed to lift a load. • Pulley also helps to move an object to a place that is hard to reach.

  9. Examples of pulley

  10. Wedges • A wedges is made of two inclined planes that come together. • Wedges are used to push or split object apart. • The bottom part of an axe is wedge. It used to split the piece of wood into two pieces. • A knife is used as a wedge to cut a piece of bread.

  11. Example of wedges

  12. Gear • A gear is a wheel with jagged edges like teeth. • Gear are used to change the speed or direction to one another. • When one gear turn clockwise, the other gear turns anti-clockwise. • However, there are gears that rotate in the same direction like bicycle. • Gear come in different sizes, the big and the small gear.

  13. Gear • When the big gear turns once, the small gear turns many times. • Therefore the small gear turns faster than the big gear. Example of tools using gears;

  14. Inclined plane • An inclined plane is simple is a simple machine with flat surface. • One end of an inclined plane is higher than the other end. • Inclined planes help people move object to higher or lower place.

  15. Examples of a inclined plane

  16. Screw • A screw is an inclined plane wrapped around a rod. • A screw is used to hold objects together. • Examples of tools using screws are;

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