Flashcards
Physics equations
Flashcards do conjunto (22)
- 1Equation for average speedaverage speed= distance moved/ time taken
- 2Equation for forceForce = mass x acceleration
- 3Acceleration=acceleration= change in velocity/ time taken
- 4Momentum = ?Momentum = mass x velocity
- 5Density = ?Density = mass / volume
- 6Work done = ?Work done = force x distance moved
- 7Work done = ?Energy transferred = work done
- 8Kinetic energy = ?kinetic energy = 1/2 x mass x speed2
- 9GPEGPE = mass x g x height
- 10Weight = ?Weight= mass x gravitational field strength
- 11Pressure= ?Pressure = force/ area
- 12The relationship between movement of a force and it's distance from the pivotmovement = force x perpendicular distance from the pivot
- 13charge = ?charge = current × time
- 14Voltage = ?Voltage = current x resistance
- 15electrical power= ?electrical power = voltage × current
- 16wave speed = ?wave speed = frequency × wavelength
- 17Relationship between voltage and turnsinput (primary) voltage / output(secondary)voltage =
primary turns / secondary turns - 18Refractive index = ?n= sin i / sin r
angle of incidence / refraction - 19Relationship between refractive index and critical anglesin c = 1 / n
- 20Efficiency = ?efficiency = useful energy output / total energy output
- 21Pressure differencepressure difference = height × density × g p=h×ρ×g
- 22Input power = ?input power = output power
Vp Ip = Vs Is for 100% efficiency