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Flashcards in paper 1 : equations Deck (10)
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1

how do you calculate kinetic energy

kinetic energy = 0.5 x mass x (speed)^2
(Ek = 0.5mv)^2

2

how do you calculate gravitational potential energy

gravitational potential energy = mass x gravitational field strength x height
(Ep = mgh)

3

how do you calculate power

power = energy transferred / time (P=E/t)
OR
power = work done / time (P=W/t)

4

how do you calculate efficiency

efficiency = useful energy output/ total energy input
OR
efficiency = useful power output/ total power input

5

how do you calculate charge flow

charge flow = current x time (Q=It)

6

how do you calculate potential difference

potential difference = current x resistance (V=IR)

7

how do you calculate electrical power

power = potential difference x current (P=VI)
OR
power = (current)^2 x resistance (P=I^2R)

8

how do you calculate energy transferred

energy transferred = power x time(E=Pt)
OR
energy transferred = charge flow x potential difference (E=QV)

9

how do you calculate density

density = mass / volume

10

how do you calculate pressure in gases

pressure x volume =constant (pV=constant)