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Physics > Equations > Flashcards

Equations Flashcards

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1
Q

How do you calculate weight?

A

Weight = Mass x gravitational field strength

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2
Q

How do you calculate work done?

A

Woke done = Force x distance

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3
Q

How do you calculate force applied to a spring?

A

Force = Spring constant x extension

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4
Q

How do you calculate moment of a force?

A

Moment = Force x distance (perpendicular to force)

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5
Q

How do you calculate pressure?

A

Pressure = Force / area

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6
Q

How do you work our distance travelled?

A

Distance = Speed x time

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7
Q

How do you work out acceleration?

A

Acceleration = Change in velocity / time taken

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8
Q

How do you work out resultant force?

A

Resultant force = Mass x acceleration

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9
Q

How do you work out momentum?

A

Momentum = Mass x velocity

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10
Q

How do you work out kinetic energy?

A

Kinetic energy = 1/2 x mass x speed (squared)

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11
Q

How do you work out gravitational potential energy?

A

Gravitational potential energy = mass x gravitational field strength x height

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12
Q

How do you work out power in terms of energy?

A

Power = energy transferred or work done / time

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13
Q

How do you calculate efficiency in terms of energy transfer?

A

Efficiency = useful output energy transfer / total input energy transfer

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14
Q

How do you work out efficiency in terms of power?

A

Efficiency = Useful power output / total power input

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15
Q

How do you calculate wave speed?

A

Wave speed = Frequency x wavelength

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16
Q

How do you calculate potential difference?

A

Potential difference = current x resistance

17
Q

How do you calculate power in terms of current? State both equations.

A

Power = potential difference x current

Power = current (squared) x resistance

18
Q

How do you calculate energy transferred in terms of power?

A

Energy transferred = power x time

19
Q

How do you calculate energy transferred in terms of charge flow?

A

Energy transferred = charge flow x potential difference

20
Q

How do you calculate density?

A

Density = Mass / volume

21
Q

How do you work out charge flow?

A

Charge flow = current x time

22
Q

What is the equation to calculate force for a conductor at 90° to a magnetic field and carrying a current?

A

Force = magnetic flux density (T - Tesla) x current x length

23
Q

What is the equation to calculate a period?(In waves)

A

Period (secondsw) = 1/frequency (hertz)

24
Q

What is the wave equation?

A

Wave speed (m/s) = frequency (hertz) x wavelength (m)

Physics (9 decks)

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