Combined Equations Flashcards
(19 cards)
Distance travelled = Average speed * time
D = s * t
Acceleration = Change in velocity / time taken
a = (v-u) / t
Force = Mass * acceleration
F = m * a
Weight = Mass * gravitational field strength
W = m * g
(Higher tier) momentum = Mass * velocity
M = m * v
Change in GPE = Mass * gravitational field strength * vertical height change
GPE = m * g * ∆h
Kinetic energy = 0.5 * mass * speed^2
KE = 0.5 *m * v^2
Efficiency = Useful energy / total energy
.
Wave speed = Frequency * wavelength. or. Distance / time
v = f * λ. or. v = x / t
Work done =
Force*distance moved in direction of force
Power = Work done / time taken
Energy transferred = Charge moved * potential distance
E = Q * V
Charge = Current * time
Q = I * t
Potential difference = Current * resistance
V = I * R
Power = Energy transferred * time taken
P = E / t
Electrical power = Current * potential difference. or. Current^2 * resistance
P = I * V. or P = I^2 * R
Density = Mass / volume
d = m / v
force exerted on a spring = spring constant × extension
F = k * x
(final velocity)2 – (initial velocity)2 = 2 × acceleration × distance
v^2 − u^2 = 2 * a * x
