Equations Flashcards by Ethan Lim

Q

Distance travelled(m)

A

speed (m/s)x time(s)

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Q

Energy

A

Potential difference x Charge

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Q

Charge

A

Current x time

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Q

Wavespeed

A

Frequency x wavelength

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Q

Momentum(kgm/s)

A

Mass(kg) x velocity(m/s)

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Q

Potential difference ( voltage)

A

Current x resistance (ohms)

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Q

Weight (N)

A

Mass (kg) x gravitational field strength(N/kg)

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Q

Work done(J)

A

Force (N) x Distance(s)

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Q

Force applied to a string (N)

A

Spring constant (N/m)x extension(m)

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Q

Acceleration (m/s^2)

A

Change in velocity (m/s)/ time taken(s)

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Q

Resultant force(N)

A

Mass(kg) x acceleration (m/s^2)

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Q

Kinetic energy(J)

A

0.5 x mass (kg) x speed^2(m/s^2)

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Q

Gravitational potential energy(J)

A

Mass (Kg) x gravitational field strength (N/kg) x height(m)

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Q

Power(w)

A

energy transferred(J) / time(s)

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Q

Power(w) can also equal

A

Work done(J) / time(s)

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Q

Effieciency

A

Useful output energy transfer/ total input energy transfer