Kinetic energy
What is kinetic energy
energy associated with the movement of an object
what is it?
energy associated with mass and position of an object
what is it?
how much useful energy is produced compared to the total energy input
what is the law of conservation of energy
energy cannot be created nor destroyed, only transferred or transformed
what are the types of kinetic energy
electrical, radiant, sound, thermal
example of potential energy in action
book on the edge of a shelf before it falls
formula for energy efficiency
efficiency= useful energy output/total energy output x100
energy transfer
when energy is transferred from one object to another without changing its type
EK= 1/2mv2
PE= mxgxh
what is power? and the formula
the rate at which work is done, or energy is transferred
P=W/T
energy transformation
when one type of energy is changed into another type
what happens to KE when mass doubles
KE doubles too
types of potential energy
chemical, gravitational, elastic, nuclear
what is work and the formula
something done to/on an object when a force causes the object to move
W=FxM
what is a sankey diagram
a flow chart representing the flow of energy through a system and the proportion of useful energy and wasted energy in comparison to the total energy input
when velocity is measured in km/h, how do you convert it to m/s
divide by 3.6
what is mechanical energy and its equation
energy associated with the motion and position of an object, ME=KE+PE
what is energy measured in
joules
what do the arrows on a sankey diagram represent