Correct Triangles Flashcards
Average speed (m / s)
Total distance covered (m) / time taken (s)
Acceleration (m/s2)
Change in velocity (meters per second) / time taken for change (seconds)
Force (newton, N)
Mass (kilogram, kg) x acceleration (m/s2)
Weight (newton, N)
Mass (kilogram, kg) x gravitational field strength (newton/kilogram, N/kg)
Moment (newton meter, Nm)
Force (newton, N) x perpendicular distance between line of action and pivot (meter, m)
Orbital speed (m/s)
2 x pie x orbital radius (meters) / time (seconds)
Power (watt, W)
Voltage (volt, V) x current (ampere, A)
Energy transferred (joule, J)
Current (A) x voltage (V) x time (second, s)
Voltage (volt, V) ohm’s law
Current (ampere, A) X resistance (ohm, omega symbol)
Charge (coulomb, C)
Current (A) x time (s)
Transformer equations
Input voltage / output voltage = number of turns on primary coil / number of turns on secondary coil
Input power (watts, W) = output power (watts, W)
Wave speed (meters per second)
Frequency (hertz, Hz) X wavelength (meter, m)
Frequency (hertz, Hz)
1 / time period (seconds, s)
Refractive index
Sin i / Sin r
Efficiency
Useful energy transferred by device / total energy supplied to device
Work done (joules, J)
Force applied (newton, N) X distance moved in direction of force (metre, m)
Work done = energy transferred
Gravitational potential energy (joule, J)
Mass (kilogram, kg) x gravitational field strength (newton per kilogram, N / kg) x height (metre, m)
Kinetic energy (joule, J)
1/2 x mass (kg) x (speed)2 [(metre per second)2]
Power (watt, W)
Work done (joule, J) / time taken (second, s)
Density (kg / m3)
Mass (kg) / volume (m3)
Pressure (Pa)
Force (N) / area (m2)
1 Pa = 1 N / m2
Pressure difference (Pascal)
Height (m) x density (kilogram per cubic meter) x gravitational field strength (newton per kilogram, N / kg)
Boyle’s law
Pressure 1 (Pa) x volume 1 (m3) = pressure 2 (Pa) x volume 2 (m3)
Charles’ Law
Pressure 1 (Pa) / temperature 1 (kelvin, K) = pressure 2 (Pa) / temperature 2 (kelvin, K)
