Physics equations Flashcards
Equation for acceleration
Acceleration = change in velocity / time taken
The equation for average speed
Average speed = total distance travelled \ total time taken
Equation for force
Force = mass * acceleration
Equation for weight
Weight = mass * gravitational field strength
Equation for momentum
Momentum = mass * velocity
Equation for moment
Moment = force * perpendicular distance from pivot
Equation for power
Power = current * voltage
Equation for energy
Energy = power * time
Equation for current in amps
Current in amps = change in coulombs / time in seconds
Equation for voltage
Voltage = current * resistance
Equation for wave speed
Wave speed = frequency * wavelength
Law of reflection
The angle of incidence = the angle of reflection
The law of refraction
Refractive index = sin I / sin r
Equation for efficiency
Efficiency = useful energy output from the system / total energy input to the system
Equation for work
Work = force * distance
Equation for gpe
Gpe = mass * gravitational field strength * hight
Equation for ke
Ke = 1/2*mass * speed2
Equation for work done
Work done = power * time
Equation for density
Density = mass / volume
Equation for pressure
Pressure = force / area
Equation for pressure difference
Pressure difference in pa = hight in m * density in kg/m3 * gravitational field strength in n/kg
