equations Flashcards
(23 cards)
Weight using gravitational field strength and mass.
W = m g
Work done using force and distance along the line of action of the force.
W = F s
Force applied to a string using spring constant and extension.
F = k e
Moment of force using force and distance normal to direction of force.
M = F d
Pressure using force normal to a surface area and area of the surface.
p = F / A
Distance travelled using speed and time.
s = v t
Acceleration using change in velocity and time taken.
a = Δv / t
Resultant force using mass and acceleration.
F = m a
Momentum using mass and velocity.
p = m v
Kinetic energy using mass and speed.
Ek = 1/2m v^2
Gravitational potential energy using mass, gravitational field strength and height.
Ep = m g h
Power using energy transferred and time.
P = E / T
Power using work done and time.
P = W / t
Efficiency using useful output energy transfer and useful input energy transfer.
efficiency = useful output energy transfer / useful input energy transfer
Efficiency using useful power output and total power output.
efficiency = useful power output / total power output
Wave speed using frequency and wavelength.
v = f λ
Charge flow using current and time.
Q = I t
Potential difference using current and resistance.
V = I R
Power using potential difference and current.
P = V I
Power using current and resistance.
P = I^2 R
Energy transferred using power and time.
E = P t
Energy transferred using charge flow and potential difference.
E = Q V
Density using mass and volume.
Ρ = m / V
