Physics equations

Question	Answer
Equation for average speed	average speed= distance moved/ time taken
Equation for force	Force = mass x acceleration
Acceleration=	acceleration= change in velocity/ time taken
Momentum = ?	Momentum = mass x velocity
Density = ?	Density = mass / volume
Work done = ?	Work done = force x distance moved
Work done = ?	Energy transferred = work done
Kinetic energy = ?	kinetic energy = 1/2 x mass x speed2
GPE	GPE = mass x g x height
Weight = ?	Weight= mass x gravitational field strength
Pressure= ?	Pressure = force/ area
The relationship between movement of a force and it's distance from the pivot	movement = force x perpendicular distance from the pivot
charge = ?	charge = current × time
Voltage = ?	Voltage = current x resistance
electrical power= ?	electrical power = voltage × current
wave speed = ?	wave speed = frequency × wavelength
Relationship between voltage and turns	input (primary) voltage / output(secondary)voltage = primary turns / secondary turns
Refractive index = ?	n= sin i / sin r angle of incidence / refraction
Relationship between refractive index and critical angle	sin c = 1 / n
Efficiency = ?	efficiency = useful energy output / total energy output
Pressure difference	pressure difference = height × density × g p=h×ρ×g
Input power = ?	input power = output power Vp Ip = Vs Is for 100% efficiency

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	Created by inds12 over 9 years ago