PHYSICS EQUATIONS Flashcards
Weight =
W = mg
Mass x gravitational field strength
Work done =
W = Fs
Force x distance
Force applied to a string =
F = ke
Spring constant x extension
Moment =
M = Fd
Force x distance
Pressure =
P = F/a
Force ➗ area
Distance travelled =
S = vt
Speed x time
Acceleration =
a = v/t
Change in velocity ➗ time taken
Resultant force =
F = m/a
Mass x acceleration
Momentum =
p = mv
Mass x velocity
Kinetic energy =
E =
2
0.5 x mass x speed
2
E = 1/2 mv
k
Gravitational potential energy
E = mgh
Mass x gravitational field strength x height
Power =
P = E/t
Energy transferred ➗ time
Power =
P = W/t
Work done ➗ time
Energy transferred =
E = Pt
Power x time
Efficiency
Useful output energy ➗ total output energy
Wave speed
v = f ):(/
Frequency x wavelength
Density
p = m/v
Mass ➗ volume
Charge flow =
Q = It
Current x time
Potential difference
V = IR
Current x resistance
Power =
P = VI
Potential difference x current
Power =
P = current and resistance
2
Current x resistance
I^2 R
Energy transferred =
E = QV
Charge flow x potential difference
