Formulae - Energy Flashcards
‘v’ stands for …
velocity (m/s)
‘h’ stands for …
height (m)
‘g’ stands for …
gravity (m/s^2)
Ep =
m x g x h
Ek =
1/2 x m x v^2
Ek stands for …
Kinetic Energy (J)
Ep stands for …
Potential (J)
Value for g
10
F =
m x a
Weight =
m x g
Work =
F x d
work is measured in
J
Force is measured in
N
Efficiency =
(useful energy)/(total energy) x 100%
Elastic Energy =
1/2 x k x e^2
‘e’ stands for …
extension (m)
‘k’ stands for …
spring constant (N/m)
(in S.H.C.) E =
m x c x (change in)T
‘c’ stands for …
specific heat capacity (J/kg degree C)
To calculate a change in T …
subtract the ending value from the starting value
(with electricity) P =
I x V
‘I’ stands for …
Current (A)
‘P’ stands for …
Power (W)
‘V’ stands for …
potential difference OR voltage (V)
(in SHC prac) Work =
P x t
‘t’ stands for …
time (s)
‘change in’ is represented by …
delta (a triangle)
work is a type of …
energy
P = [two different formula]
E/t or W/t
These are all measured in Joules
work, kinetic energy, potential energy, elastic energy, energy transferred
