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Simple Machines

Simple Machines. Simple Machines. Machines are tools that make jobs easier by: Changing the size of the force Changing the direction of the force Increasing the speed or distance the object is moved. Simple Machines. Inclined plane Wedge Screw. Simple Machines. Lever

stuart-frost
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Simple Machines

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  1. Simple Machines

  2. Simple Machines • Machines are tools that make jobs easier by: • Changing the size of the force • Changing the direction of the force • Increasing the speed or distance the object is moved

  3. Simple Machines Inclined plane Wedge Screw

  4. Simple Machines Lever Pulley Wheel & Axle

  5. Mechanical Advantage • MA is the number of times a machine multiplies the force being applied • Ideal mechanical advantage (IMA) is the number of times the applied force is multiplied under ideal conditions. This assumes no friction!

  6. Mechanical Advantage • Actual mechanical advantage (AMA) is the number of times the applied force is multiplied under real conditions

  7. Calculating IMA

  8. Calculating IMA For a ramp 10m long and 2m high: dE=ramp length=10m dR= ramp Height=2m

  9. Calculating AMA

  10. Calculating AMA

  11. Efficiency

  12. Efficiency

  13. Word Problems • RTDQ – Read the darn question! • What is the question asking me to find? • What information do I have in the problem? Draw a picture! • If I don’t have enough information, is it a two-step problem?

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