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Simple and Complex Machines BRMS 6 th Science

Simple and Complex Machines BRMS 6 th Science. Standard 6-5.8. Illustrate the ways that simple machines exist in common tools and in complex machines. Simple Machines…….

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Simple and Complex Machines BRMS 6 th Science

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  1. Simple and Complex Machines BRMS 6th Science

  2. Standard 6-5.8 • Illustrate the ways that simple machines exist in common tools and in complex machines.

  3. Simple Machines…… • Simple machines, such as levers, pulleys, inclined planes (ramps, wedges, screws) and wheel and axles are found in common tools and in complex (compound) machines.

  4. Levers-First Class • 1. E-F-L • 2. Leversthat have the fulcrum between where the effort force is applied and the weight is located can be found in tools

  5. First Class Lever Examples . 3. scissors (two levers working together) and crowbar..

  6. Levers-Second Class • 1. E-L-F • 2. Levers that have the fulcrum on the end and the effort force are applied on the other end to lift a weight in the middle can be found in tools

  7. Second Class Lever Examples 3. a wheelbarrow, or a bottle opener.

  8. Levers-Third Class • 1. L-E-F • 2. Levers that have the fulcrum on the end and the effort is applied in the middle to lift a weight on the other end can be found in tools.

  9. Third Class Lever Examples 3. tweezers (two levers working together) or a broom.

  10. Fixed Pulley Fixed pulley: • Pulleys that are fixed, meaning that they are attached to a structure, can be found on the top of a flag pole and on window blinds.

  11. Moveable Pulley • Pulleys that are moveable, meaning that they are not attached to a structure, can be found on construction cranes and as part of a block and tackle system.

  12. INCLINED PLANE • 1. Inclined planes with a sloping surface can be found as ramps on a truck or wheelchair ramp and stairs

  13. Inclined Planes-WEDGES • Inclined planes that are wedges, one inclined plane or two back-to-back inclined planes that can move are found as knife blades or nails.

  14. Inclined Plane-SCREWS • 1. Inclined planes that are wound around a post or cylinder are called screws.

  15. Screws Screws can be found in bolts and jar lids.

  16. WHEEL & AXLE • ●Wheel and axles consist of two circular objects: a central shaft, called an axle, inserted through the middle of a wheel.

  17. Wheel and Axle Examples…. • Wheel and axles can be found as door knobs, steering wheels, screwdrivers, gears, and bicycles wheels.

  18. Complex Machines • Complex machines, also known as compound machines, consist of two or more simple machines.

  19. Complex Machine Examples • scissors consisting of two levers and two inclined planes (wedges)

  20. Complex Machine Examples • a fishing pole consisting of a lever, a wheel and axle and a pulley

  21. Complex Machine Examples • a bicycle consists of levers (handlebars and handbrakes), wheel and axles (gears, wheels, and pedals), and a number of screws.

  22. Rube Goldberg Machines Rube Goldberg machines are examples of complex machines. All complex machines are made up of combinations of simple machines. Rube Goldberg machines are usually a complicated combination of simple machines. By studying the components of Rube Goldberg machines, we learn more about simple machines

  23. Safety Device for Walking on Icy Pavements When you slip on ice, your foot kicks paddle (A), lowering finger (B), snapping turtle (C) extends neck to bite finger, opening ice tongs (D) and dropping pillow (E), thus allowing you to fall on something soft.

  24. Name the Simple Machines

  25. Lever • Wheel and Axle • Inclined Plane • Lever • Wedge • Inclined Plane

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