HT Equations Flashcards
What is the equation for Kinetic Energy?
kinetic energy = 0.5 × mass × (speed)^2
Ek = 1/2mv^2
What is the equation for Gravitational Potential Energy?
gravitational potential energy = mass × gravitational field strength × height
Ep = mgh
What is the equation for Power?
power = energy transferred / time
P = E / t
Power = work done / time
P = W / t
What is the equation for efficiency?
Efficiency = useful output energy transfer / total input energy transfer
Efficiency = useful power output / total power input
What is the equation for Charge flow?
charge flow = current × time
Q = I t
What is the equation for potential difference?
potential difference = current × resistance
V = I R
What is the equation for power?
power = potential difference × current
P = V I
power = (current)^2 × resistance
P = I^2 R
What is the equation for energy transferred?
energy transferred = power × time
E = P t
energy transferred = charge flow × potential difference
E = Q V
What is the equation for density?
Density = mass / volume
p = m / V
What is the equation for weight?
weight = mass × gravitational field strength
W = m g
What is the equation for work done?
work done = force × distance (along the line of action of the force)
W = F s
What is the equation for Force?
force = spring constant × extension
F = k e
What is the equation for moment of a force?
moment of a force = force × distance (normal to direction of force)
M = F d
What is the equation for pressure?
Pressure = force normal to a surface / area of that surface
p = F / A
What is the equation for distance travelled?
distance travelled = speed × time
s = v t
What is the equation for acceleration?
acceleration = change in velocity / time taken
What is the equation for the resultant force?
resultant force = mass × acceleration
F = m a
What is the equation for momentum?
momentum = mass × velocity
p = m v
What is the equation for wave speed?
wave speed = frequency × wavelength
