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Published byMorgan Baker Modified over 8 years ago
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ENERGY in space!
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Kinetic Energy Potential Energy Energy Stored within an object. Energy in motion! Two types of Energy
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Moving car Parked car Our Sun A tennis ball hanging from a string A baseball at the top of a hill A bucket of water??? Kinetic or potential energy?
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If an object is moving we can find it’s kinetic energy! KE – Kinetic Energy (Joules) m – mass (Kg) V – velocity (m 2 /s 2 ) How to find Kinetic energy
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Examples: Determine the Kinetic energy of a 500kg roller coaster train which moves at a speed of 20 m/s What is the speed of a 55 kg woman running with a kinetic energy of 412.7 J? The moon has a mass of 7.36 1022 kg and moves about the earth in a circular orbit of radius 3.80 108 m with a period of 27.3 days. Determine the kinetic energy of our moon! (hint: you’ll need to use the formula 2πr 2 )
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PE = m x g x h PE – Potential energy (Joules) M – mass (Kg) g – acceleration due to gravity (m/s 2 ) h – height (meters) Solve for m, g, and h! How to find Potential Energy
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A cat had climbed at the top of the tree. The Tree is 20 meters high and the cat weighs 6kg. How much potential energy does the cat have? ( g=9.8m/s 2 ) On a 3m ledge, a rock is laying at the potential energy of 120 J. What will be the mass of the rock. PE = m x g x h
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HEAT! Heat is a measurement of energy in units of Joules! What is the most common form of energy that we can feel on a daily basis? Temperature is a measurement of the average movement of molecules in a substance
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Which has more Kinetic Energy (heat)? Which is a higher temperature? AB
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Heat is transferred through Convection, Conduction, and Radiation
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