Conservation of Energy Flashcards

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1
Q

What’s Energy Transformation?

A

The change of energy between potential and kinetic forms.

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2
Q

What is an example of Potential to Kinetic?

A

A car going down hill, the energy gradually becomes Kinetic until the slope ends.

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3
Q

What is an example of Kinetic to Potential?

A

A cart going up a hill, it is preparing to go down again so the Kinetic gradually changes to Potential.

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4
Q

How is transformation shown in the flight of a ball?

A

A ball curves during flight because gravity changes the Kinetic Energy to Potential Energy.

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5
Q

What’s the law of Conservation of Energy?

A

Energy cannot be created or destroyed.

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6
Q

Where does some of the energy go?

A

When a cart moves on a track for example, it can’t go as high up a hill as the previous hill. Air resistance and friction are some of the factors that decrease the energy for movment of an object.

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7
Q

What’s Efficiency?

A

It’s a measure of how much useful work something can do.

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8
Q

What’s the Efficiency Equation?

A

Efficiency=Useful Work Output/Work Input

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9
Q

How do Machines work if Energy leaks away all the Time?

A

We give machines energy input so that they constantly work. Unfortunately, this means that perpetual motion machinery is impossible.

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