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Simple Machines

Simple Machines. What is a Simple Machine?. A simple machine has few or no moving parts. Simple machines make work easier. Simple Machines. Is a device that helps do work. Definitions:. Energy:. Ability to do work. Work= . Force x Distance. Force:. A Push or a Pull.

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Simple Machines

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  1. Simple Machines

  2. What is a Simple Machine? • A simple machine has few or no moving parts. • Simple machines make work easier

  3. Simple Machines Is a device that helps do work

  4. Definitions: Energy: Ability to do work Work= Force x Distance Force: A Push or a Pull

  5. The 6 Simple Machines Screw Wedge Inclined Plane Pulley Wheel and Axle Lever

  6. Lever

  7. Lever Is a simple machine that consists of bar that pivots on fixed point called fulcrum

  8. Definitions : • A simple machine • A board or bar that rests on a turning point called the fulcrum • Used to change the amount, the strength and the direction of movement. • The position of the force and the load can be changed by moving them to different points on the lever.

  9. Levers types:

  10. Levers-First Class • In a first class lever the fulcrum is in the middle and the load and effort is on either side • Think of a see-saw

  11. First Class Lever • Common examples of first-class levers include crowbars, scissors, pliers, tin snips and seesaws.

  12. Levers-Second Class • In a second class lever the fulcrum is at the end, with the load in the middle • Think of a wheelbarrow

  13. Second Class Lever • Examples of second-class levers include nut crackers, wheel barrows, doors, and bottle openers.

  14. Levers-Third Class • In a third class lever the fulcrum is again at the end, but the effort is in the middle • Think of a pair of tweezers

  15. Third Class Lever • Examples of third-class levers include tweezers, arm hammers, and shovels.

  16. Parts of lever:

  17. The lever will be equilibrate when:load x load arm = effort x effort arm load moment = effort momentwe call this Equilibrium law

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