PhysicsWork Flashcards
Work done
the ammount of energy transferred when one body exerts force on another , the energy transeffered by a force when it moves
Work done=Energy transferred
equation for work
W=force times distance
Sankey diagram
a flow diagram that repersents the principle of conservation of energy the width of the arrows is the same as the total energy
Prinicble of conservation of energy
Energy is never destroyed only stored or transferred
Calculate effecieny
efficency= useful energy output/total energy output
percentage efficency
efficency= useful energy output/total energy output times 100
Kinetic energy
energy of moving object
energy
quantity that must be changed or transferred to make something happen.
G.P.E
energy of something higher in the air due to gravity
Doing work
transferring energy by means of a force
change in G.P.E
change in MGH
how to find kinetic energy
1/2 times mass times vecolicty2
1J is equal to
1nm
what is power
the rate at wich work is done or the rate at wich energy is transfered
power equation
Work done
____________
time taken