Equations Paper 1 Flashcards

1
Q

Kinetic energy

A

1/2mv^2

1/2 x mass x velocity^2

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2
Q

Gravitational potential energy

A

m g h

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3
Q

Power (energy)

A

Work done or energy transferred / time

P= W/t or E/t

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4
Q

Efficiency

A

Useful energy, or power output/ total energy, or power input

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5
Q

Charge

A

Current x time

Q=IT

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6
Q

Potential difference (voltage)

A

Current x resistance

V=IR

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7
Q

Power (electricity)

A

Current x potential difference. P=IV

or

Current^2 x resistance. P=I^2R

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8
Q

Energy transferred (electricity)

A

Power x time E=Pt

or

Charge x potential difference. E=QV

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9
Q

Density

A

Mass/ volume

D=M/V

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10
Q

Elastic potential energy

A

1/2ke^2

1/2 x spring constant x extension^2

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