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Starter Directions: Copy the following examples. Answer using the following terms: Mechanical, Thermal, Chemical, Electrical 1.Hydroelectric dam 2.A horse pulling a cart 3.A thermos of hot coffee 4.The bonds holding atoms together in food

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Review Directions: Complete the statements below. 1.What is the formula for work? 2.What is the formula for power? 3.What is the work if a horse pulls a box 5m with a force of 10 N? 4.It takes 8 seconds for a pulley system to lift a load with 400 N.m. How much power is required?

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Review Directions: Draw the following table. Match the example up with the correct simple machine type: Wedge, Lever, Wheel and Axle`, Pulley Example Type 1.Shovel 2.Axe 3.Doorknob 4.Window blinds

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What Energy Form? Directions: Label the picture with the correct energy form. Electrical, nuclear, Thermal, and Mechanical a. b.c. d.

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Energy Transformation

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Directions: Each object starts with electrical energy but it converts that energy into another energy. What energy type does it convert into? Thermal, Mechanical, or Electromagnetic

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Kinetic vs. Potential Kinetic energy Motion The closer the object is to the ground the greater the kinetic energy. KE=1/2(m)v 2 KE= kinetic m= mass v= velocity Unit=Joule Potential Energy Stored (Has the potential to move) The higher the object the greater the potential energy. PE=m(g)(h) PE=Potential m= mass g= gravity h= height Unit=Joule

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The ball starts at rest waiting (PE) to move. Then with a force it moves down the hill (KE).

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If an object has PE it will have KE. You cannot have one without the other.

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KE and PE http://www.teachersdomain.org/res ource/hew06.sci.phys.maf.rollercoast er/

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Exit Slip Directions: Copy the examples and label which one is KE or PE. 1. a moving skateboard 2. a dry cell of a battery 3. a rock at the edge of a cliff 4. an acorn hanging from an oak tree 5. a glass of milk 6. a person climbing a ladder 7. Gasoline 8. a piece of celery 9. a basketball passing through a hoop 10. blowing wind

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