equations Flashcards
Kinetic energy
Ke = 1/2 mv ^ 2
GPE
GPE = mass * gravitational field strength * height
efficiency
effiiciency = useful energy input/ total energy input
charge flow
charge flow = current * time
potential difference
pd = current * resistance
total resistance
total resistance = r1 + r2
Power with pd
Power = current * potential difference (P=IV)
Power with resistance
power = (current)^2 * resistance
Energy transferred with charge flow
Energy transferred = charge flow * potential difference
Energy transferred with power
energy transferred = power * time
.Density
density = mass/volume
Weight
weight = mass * gravitational field strength
work done
work done = force * distance
spring constant
force = spring constant * extension
moment
moment = force * distance (perpendicular to that force)
pressure
pressure = force normal to a surface/ area of that surface
distance traveled
distance = speed * time
acceleration
change in velocity/ time taken
resultant force
f = ma
momentum
momentum = mass * velocity
Power w work done or energy transferred
work done/ time taken
