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Science > Energy > Flashcards

Energy Flashcards

1
Q

Kinetic and potential energy are both forms of

A

Mechanical energy

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2
Q

Mgh is the formula for

A

Potential

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3
Q

(MV^2)/2 is the formula for

A

Kinetic energy

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4
Q

Going uphill potential energy ______ going downhill potential energy _______.

A

Increases, decreases

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5
Q

For an object to do work it must have

A

Energy

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6
Q

Ratio of work output to input is called

A

Efficiency

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7
Q

Output is always _____ then input

A

Less then

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8
Q

Unit of efficiency

A

__._%

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9
Q

Unit of work

A

Joule

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10
Q

Two units of power

A

Watt and horsepower

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11
Q

Unit of force

A

Newton

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12
Q

Fuuuuuuuck the rest are word problems

A

I do ain’t word good so I’m gonna skip

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13
Q

Definition of efficiency

A

The ratio of work output over work input, answered in a percentage, nothing is 100%

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14
Q

Definition of energy

A

The ability to do work

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15
Q

Definition of energy transformation

A

Energy changing from one form to another

Ex: electrical energy -> thermal energy

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16
Q

Definition of heat

A

Thermal energy that is moving or capable of moving

17
Q

Definition of Horsepower

A

Unit of power, = to 746 watts

18
Q

Definition of Joule

A

Unit of energy and work, Equal to 1 Newton times 1 meter

J= NM same as W= FD

19
Q

Definition of kinetic energy

A

Energy of motion

20
Q

Definition of potential energy

A

Energy that is stored, comes from position

21
Q

Law of conservation of energy

A

Energy cannot be created or destroyed, it can only be transformed

22
Q

Definition of power

A

The rate of doing work

23
Q

Definition of watt

A

Unit of power

24
Q

Definition of work

A

Force times distance, but the force applied must be in the same direction as the distance it moves
Ex: lifting, pushing, pulling, throwing
NOT ex: carrying, tug of war and being a tie or losing, carrying up stairs

25
Q

Increase in height will also increase

A

Potential energy

Science (11 decks)

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