Equations Flashcards
8 different energy stores
Kinetic Chemical Internal Gravitational potential Elastic potential Magnetic Electro static
Equation for gravitation potential energy
GPE=m x g(10N) x change in height
Equation for elastic potential energy
EPE=1/2 x spring constant x extension squared
Equation for kinetic energy
Kinetic energy = 1/2 x mass x speed squared
Equation for specific heat capacity
SHC=energy/(mass x temp.rise)
Equation for heat transferred
Heat transferred = mass x specific heat capacity x temperature change
What is work
When a force does work on an object it causes the object to move a distance
Equation for work done
Work done = force x distance
Equation for force
Force = work/distance
Equation for efficiency
Efficiency = useful energy output/ total energy input
What is power
Power is the rate of energy transfer. Power is measured in watts. 1 watt = 1 joule of energy transferred per second
Equation for power
Power = energy transferred/time
Power =work done/time
