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We use Simple Machines every day. Some in daily tasks and even some in sports that we play. Write a short paragraph describing a recent time you used a Simple Machine (Recall from the Machines packet you read from).

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Identify systems having mechanical operations and explain their function.(Explain how all the simple machines work) Be able to tell the difference between the 3 classes of levers. Be able to tell the difference between the different types of common gears.

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Can be as simple as a knife,

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a bottle opener,

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or a claw hammer.

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A Machine is a device that does some kind of work by changing or transmitting energy. We use a machine to give us a mechanical advantage to make work easier to accomplish.

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A shaduf, also spelled Shadoof, hand-operated device for lifting water, invented in ancient times and still used in India, Egypt, and some other countries to irrigate land. http://www.britannica.com/EBchecked/topic/537571/shaduf Egypt

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https://www.youtube.com/watch? v=i5X_jwnb-Ok

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Mocomi Kids https://www.youtube.com/watch?v=E8RA9Kw_IaE

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2 nd = Effort is at the END EFFORT then LOAD/RESISTANCE then FULCRUM 3 rd = Effort is BETWEEN LOAD/RESISTANCE then EFFORT then FULCRUM

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Take out a sheet of paper and put your name on it. You may use your notes to a identify the following class of levers. For each question, write down whether picture represents a first, second or third class lever.

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Mocomi Kids https://www.youtube.com/watch?v=ndT35aqDfAQ

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The Wheel and Axel helps us move heavy loads with less effort and reduced friction, thus giving us a mechanical advantage.

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The steam turbine concept was created or derived from the wheel and axel principle to give engineers a mechanical advantage.

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Mocomi Kids https://www.youtube.com/watch?v=LiarGb_LK10

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A pulley is a wheel on an axle that is designed to support movement and change of direction of a cable or belt along its circumference. Pulleys are used in a variety of ways to lift loads, apply forces, and to transmit power.

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Mocomi Kids https://www.youtube.com/watch?v=Zj_iWiXUZX8

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An Incline Plane is a ramp that assists in moving heavy objects up and down heights. The longer the distance of an incline plane, the less effort is needed.

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Mocomi Kids https://www.youtube.com/watch?v=LAAwZird80k

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Based on the Incline Plane, a wedge separates an object, lift a heavy load or keeps an object from moving. All in in an effort to gain a mechanical advantage.

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Mocomi Kids https://www.youtube.com/watch?v=4oPPQpF7bHY

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A simple machine of the inclined plane type consisting of a spirally grooved solid cylinder and a correspondingly grooved hollow cylinder into which it fits.

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Basic and Compound Gears https://www.youtube.com/watch?v=D_i3PJIYtuY&list=PLJH oydNo-lbQNxDuZ6HeMS69NGIlHLbgX&index=1 A rotating machine part having cut teeth, which mesh with another toothed part to transmit torque. Two or more gears working in tandem can produce a mechanical advantage.

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Some gears can be hybrids What kind of gears do you see?

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The study of liquids under pressure

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https://www.youtube.com/watch?v=Oj A-cZni7C0

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The study of pressure in gases

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https://www.youtube.com/watch?v=- R7J9BIjNEw