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Kinetic Energy

Study Slideshow

Name 2 main forms of energy in a system.

Potential and kinetic

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stored energy

potential energy

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energy in the form of motion

kinetic energy

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Energy can take many forms, such as (name 3 forms)

mechanical energy, sound energy, thermal energy

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What do all forms of energy have in common?

The ability to cause changes to a system (a set of connected things that work together).

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The increase or decrease of different forms of energy in a system has a direct effect upon

the system's physical variables.

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Name 5 examples of a system's variable.

temperature, speed, position, pressure, and motion

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Energy from a burner will cause the pot to heat up on a stove. The heat will cause the water to come to a boil. What is the relationship between?

energy and the system of the water-filled pot

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What does the law of conservation of energy state?

Energy cannot be created or destroyed.

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The energy of objects in motion.

kinetic energy

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Kinetic energy is proportional to

the mass of the moving object and grows with square of its speed.

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Scientists measure both potential energy and kinetic energy in

joules

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1 joule (J) =

1kg x m2/s2

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What does a joule describe?

the amount of energy needed to do a certain amount of work or cause a certain amount of change.

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More joules of energy can

perform more work or cause more change.

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How can scientists use the same unit (joules) to measure both types of energy?

Kinetic and potential energy are relate. Remember, a system's total energy equals its potential energy plus its kinetic energy.

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