Equations and units Flashcards
What is the formula relating charge, current and time
Q=I x T
What is the formula relating energy, power and time
E=P x T
What is the formula relating power, current and potential difference
P=I x V
What is the formula relating weight, mass and gravitational field strength
W=m x g
What is the formula for kinetic energy
The formula for kinetic energy is 0.5 x mass x speed²
=0.5 x m x v²
What is the formula relating power, current and resistance
P= I² x R
What is the formula relating density, mass and volume
D=m/v
What is the formula that links voltage, current and resistance
V= I x R
What unit do we measure power in?
Watts (W)
What is the formula for efficiency?
Useful energy/Total energy
What is the formula for gravitational potential energy?
P.E=m x g x h
What is the formula that links energy, charge flow and potential difference?
E=Q x V
What unit do we measure charge in?
Coulombs (Q)
What is the formula for work done?
Force x distance done
WD= F x d
What is the formula that links force, mass and acceleration
F=m x a
What is the formula for momentum?
Momentum(p)=m x v
What is the unit of momentum
Kg m/s
What is the formula for wave speed?
Wave speed=wavelength x frequency
What is the formula that links acceleration, change in speed and time
Acceleration=(final velocity- initial velocity) / time
a=(v-u)/t
What is the formula that links force, spring constant and extension
F=k x e
F (N)=k (N/m) x e (m)
What is the formula relating speed, distance and time
Speed=distance/time
