Triangles Flashcards
Kinetic energy
1/2mass(kg)velocity squared(m/s2)
Power(W)
Work(J)/time(s)
Distance (m)
Speed (m/s) x Time taken (s)
Acceleration m/s2
Change in velocity (v final velocity-initial velocity u) m/s / time taken (s)
Weight (Kg)
Mass (N) x gravitational field strength
10 on earth
F = resultant force
Mass N X acceleration m/s2
Momentum
Mass kg X velocity m/s =kg m/s
Force acting N
Change in momentum kg m/s x time taken for change to happen s
Moment a moment is the turning effect of a force
Force N X perpendicular distance m between line of action and pivot
Equilibrium
Anti-clockwise moment = clockwise moment
Orbital speed m/s
2 x pie x orbital radius r / time period T
Electrical power P
Current I x voltage v
Energy transferred
Current x voltage x time
Voltage
Current x resistance
Charge q
Current x time
Wave speed m/s
Frequency Hz x wavelength m
Refractive index n
Sin I / sin r
Sin c critical angle
1 / n refractive index
Energy efficiency
Useful energy / total energy input
Work done (J)
Force (N) x distance moved (m)
Power (W)
Work done (J) / Time taken (s)
Gravitational Potential energy
Mass (kg) x gravitational field 10 (m/s2) x height (m)
Density (kg/m3)
Mass (kg) / volume (m3)
Pressure (Pa) = (N/m2)
Force (N) / area (m2)
Pressure difference (Pa)
Height (m) x density (kg/m3) x gravitational field
What is the equation for a fixed mass of gas at a constant temperature?
p1V1 starting conditions = p2V2 final conditions
What is the equation in a sealed container (constant volume)
Temperature must always be in kelvin
Pressure units must stay the same as in question
p1/T1 starting conditions = p2/T2 final conditions
Transformer equation
Input (primary) voltage / output (secondary voltage) = number of turns on primary / number of turns on secondary
Transformers equation
Voltage (primary) X current (primary) = voltage (secondary) X current (secondary)
