physics equations Flashcards
1
Q
weight
A
mass x gravitational field strength
2
Q
work done
A
force x distance (along the line of action)
3
Q
kinetic energy
A
0.5 x mass x (speed)^2
4
Q
gravitational potential energy
A
mass x gravitational field strength x height
5
Q
power (1)
A
energy transferred / time
6
Q
power (2)
A
work done/time
7
Q
efficiency
A
useful output energy transfer / total input energy transfer
8
Q
power (3) electricity
A
potential difference x current
9
Q
power (4) electricity
A
current^2 x resistance
10
Q
change in thermal energy
A
mass x specific latent heat
11
Q
specific heat capacity
A
change in thermal energy / mass x temperature change
12
Q
A
