average speed
total distance / total time
or
(u + v) / 2
acceleration
a = (vu) / t
speed
(from a distancetime graph)
gradient of a distancetime graph
acceleration
(from a speedtime graph)
gradient of speedtime graph
distance travelled
(from a speedtime graph)
area under a speedtime graph
Resultant force
F = ma
Resultant force
(from a freebody diagram)
F = F(applied)  F(friction)
weight
W = mg
density
density = m/V
moment of a force
moment = F d
(where d is perpendicular distance to F)
Principle of Moments
Taking moments about the pivot
total clockwise moments = total anticlockwise moments
pressure
pressure = F / A
pressure of liquid
pressure = hρg
Pascal transmission of pressure
pressure at piston A
= pressure at piston B
kinetic energy, KE
gravitational potential energy, GPE
GPE = mgh
work done
work done = F d
(where d is the distance travelled
parallel to F)
Principle of conservation of energy 1
(falling ball)
loss of GPE = gain in KE
Principle of conservation of energy 2
(throwing a ball up vertically)
loss in KE = Gain in GPE
Principle of conservation of energy 3
(car accelerating due to a force)
gain in KE = work done by force
Principle of conservation of energy 4
(car brakes to a rest)
loss in KE = work done by friction
power
(nonelectrical)
P = E / t
P = W / t
P = F v
calibration of thermometer
calibration of thermocouple
energy gain/loss by substance when the temperature change by θ
Q = mcΔθ
(where c is the specific heat capacity of the substance)
energy gain/loss when a substance undergoes change of state
Q = ml
(where l is the specific latent heat of fusion or vaporization)
Period, T
(in waves)
T = 1 / f
wave velocity, v
v = f λ
speed of sound, v
(in a situation where there is an echo)
v = 2d / t
refractive index, n
(using i and r)
refractive index, n
(using speed of light)
refractive index, n
(depth of object)
critical angle, c
charge, Q
(units?)
(coloumbs, C)
Voltage, V
(unit?)
(volt, V)
resistance, R
(unit?)
(ohm, Ω)
resistance, R
(in terms of dimensions of wire)
p is the resistivity of the wire (depends on material)
Effective resistance
(series circuit)
Effective resistance
(parallel circuit)
Potential divider
(series circuit)
Power
(electrical power)
Electrical energy
E = VIt
Created by Teo Chun Min
over 1 year ago

