Formulae Flashcards
(32 cards)
What is the formula for density?
density (ρ) = mass (m) / volume (V)
What is the formula for average speed?
average speed (v) = distance moved (d) / time taken (t)
What is the formula for acceleration?
acceleration (a) = change in velocity (Δv) / time taken (Δt)
What is the formula for force?
force (F) = mass (m) * acceleration (a)
What is the formula for momentum?
momentum (p) = mass (m) * velocity (v)
What is the formula for impulse and how does this relate to change in momentum?
impulse (J) = force (F) * time (t) = change in momentum (Δp)
What is the formula for weight?
weight (W) = mass (m) * Earth’s gravitational field strength (g)
What is the formula for the moment of a force?
moment of force about a point (M) = force (F) * perpendicular distance from point (d)
What is the formula for the load on a stretched spring?
load (F) = spring constant (k) * extension (x)
What is the formula for pressure?
pressure (p) = force (F) / area (A)
What is the formula for pressure? (generally used for water)
pressure (p) = density (ρ) * Earth’s gravitational field strength (g) * depth (h)
What is the temperature for a kelvin temperature?
Kelvin temperature (K) = Celsius temperature (°C) + 273
What is the formula for Boyle’s Law, for a fixed mass of gas at constant temperature?
pressure 1 (p1) * volume 1 (V1) = pressure 2 (p2) * volume 2 (V2)
What is the formula for work?
work done (W) = force (F) * distance moved in direction of force (d)
What is the formula for gravitational potential energy?
gravitational potential energy (PE) = mass (m) * gravitational field strength (g) * height (h)
What is the formula for kinetic energy?
kinetic energy (KE) = 1/2 * mass (m) * velocity^2 (v^2)
What is the formula for energy transferred when temperature changes?
energy transferred (E) = mass (m) * specific heat capacity (c) * temperature change (Δθ)
What is the formula for power?
power (P) = work done (W) / time taken (Δt) = energy transferred (E) / time taken (Δt)
What is the formula for efficiency?
efficiency (E) = useful work done / total energy input = useful energy output / total energy input = useful power output / total power input
What is the formula for the speed of a wave?
speed (v) = frequency (f) * wavelength (λ)
What is the formula for the refractive index of light?
refractive index (n) = sine of angle of incidence (sin i) / sine of angle of refraction (sin r)
What is the formula for the critical angle?
sine of critical angle (sin c) = 1 / refractive index (n)
What is the formula for current related to charge?
current (I) = charge (Q) / time (t)
What is the formula for potential difference related to work done and charge?
potential difference (V) = work done (W) / charge (Q)
