Equations
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What is the formula for weight?
weight = mass x gravity (N/kg) W = mg
What is the equation for work done?
Work done = force (N) x distance W = Fs
What is the unit for gravity?
N/kg
What is the unit for force?
Newtons (N)
What is the equation for force applied to a spring?
Spring constant x extension F = ke
What is the unit for extension?
Metres (m)
What is the unit for spring constant?
Newtons per metre (N/m)
What is the equation for distance?
distance = speed x time s = vt
What is the unit for speed?
m/s
What is the unit for acceleration?
m/s^2
What is the equation for acceleration?
Acceleration = change in velocity / time taken a = 🔼v/t
What is the equation for resultant force?
mass x acceleration F = ma
What is the unit for momentum?
It is the equation of momentum, mass x velocity, figure it out yourself mate😒 p = mv kg m/s
What is the equation of momentum?
p = mv
What is the unit for kinetic energy?
J
What is the equation for kinetic energy? IT IS QUITE DIFFERENT
KE=1/2 x m x v^2 Ek = 0.5mv2
What is the formula for GPE?
mass x gravity x height GPE = mgh
What is the GPE?
gravitational potential energy measured in joules
What is the power equation?
work done or energy transferred (J) / time taken P = w / t P = e / t
What is the unit for power?
Watts (W)
What is the equation for efficiency (POWER)?
Efficiency = useful energy output/total energy input
What is the equation for efficiency (ENERGY TRANSFER)?
efficiency = useful output energy transfer / total input energy transfer
What is the unit for wave speed?
m/s
What is the unit for frequency?
Hertz (Hz)