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Published byAbel Cummings Modified over 6 years ago

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THE NATURE OF ENERGY IPC Notes

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ENERGY Energy is involved in every change that occurs Energy can be found in many different forms ex) thermal, electrical, chemical, etc.

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KINETIC ENERGY Kinetic energy is energy in the form of motion. Kinetic energy depends on both the mass and the velocity of a moving object.

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KINETIC ENERGY KE = mV 2 2

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KINETIC ENERGY KE = mV 2 2 KE = kinetic energy (Joules)

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KINETIC ENERGY KE = mV 2 2 KE = kinetic energy (Joules) m = mass (kg)

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KINETIC ENERGY KE = mV 2 2 KE = kinetic energy (Joules) m = mass (kg) V = velocity (m/s)

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KINETIC ENERGY Determine the kinetic energy of a 625 kg roller coaster car that is moving with a speed of 18.3 m/s.

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KINETIC ENERGY If the roller coaster car in the previous problem were moving with twice the speed, then what would be its new kinetic energy?

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POTENTIAL ENERGY Potential energy is the stored energy due to an object’s position. There are 3 types of potential energy.

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POTENTIAL ENERGY Elastic potential energy is the energy stored in something that can stretch or compress. ex) a rubber band or a spring

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POTENTIAL ENERGY Chemical potential energy is the energy stored in chemical bonds. ex) gasoline or food

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POTENTIAL ENERGY Gravitational potential energy is the energy stored by objects above the Earth’s surface.

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POTENTIAL ENERGY Gravitational potential energy is the energy stored by objects above the Earth’s surface. Gravitational potential energy depends on both the mass and the height of an object.

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POTENTIAL ENERGY GPE = m x g x h

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POTENTIAL ENERGY GPE = m x g x h GPE = gravitational potential energy (Joules)

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POTENTIAL ENERGY GPE = m x g x h GPE = gravitational potential energy (Joules) m = mass (kg)

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POTENTIAL ENERGY GPE = m x g x h GPE = gravitational potential energy (Joules) m = mass (kg) g = gravity (9.8 m/s 2 )

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POTENTIAL ENERGY GPE = m x g x h GPE = gravitational potential energy (Joules) m = mass (kg) g = gravity (9.8 m/s 2 ) h = height (m)

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POTENTIAL ENERGY Wile E. Coyote has a mass of 50 kg. While chasing the Roadrunner, he accidentally runs off the edge of a cliff 60 meters high. What is his gravitational potential energy?

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POTENTIAL ENERGY How high off the ground is a book if it contains 198 joules of potential energy and has a mass of 5 kg?

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