Formulae - Energy Flashcards
(30 cards)
1
Q
‘v’ stands for …
A
velocity (m/s)
2
Q
‘h’ stands for …
A
height (m)
3
Q
‘g’ stands for …
A
gravity (m/s^2)
4
Q
Ep =
A
m x g x h
5
Q
Ek =
A
1/2 x m x v^2
6
Q
Ek stands for …
A
Kinetic Energy (J)
7
Q
Ep stands for …
A
Potential (J)
8
Q
Value for g
A
10
9
Q
F =
A
m x a
10
Q
Weight =
A
m x g
11
Q
Work =
A
F x d
12
Q
work is measured in
A
J
13
Q
Force is measured in
A
N
14
Q
Efficiency =
A
(useful energy)/(total energy) x 100%
15
Q
Elastic Energy =
A
1/2 x k x e^2
16
Q
‘e’ stands for …
A
extension (m)
17
Q
‘k’ stands for …
A
spring constant (N/m)
18
Q
(in S.H.C.) E =
A
m x c x (change in)T
19
Q
‘c’ stands for …
A
specific heat capacity (J/kg degree C)
20
Q
To calculate a change in T …
A
subtract the ending value from the starting value
21
Q
(with electricity) P =
A
I x V
22
Q
‘I’ stands for …
A
Current (A)
23
Q
‘P’ stands for …
A
Power (W)
24
Q
‘V’ stands for …
A
potential difference OR voltage (V)
25
(in SHC prac) Work =
P x t
26
't' stands for ...
time (s)
27
'change in' is represented by ...
delta (a triangle)
28
work is a type of ...
energy
29
P = [two different formula]
E/t or W/t
30
These are all measured in Joules
work, kinetic energy, potential energy, elastic energy, energy transferred
