What is a Joule?
A unit of energy
A type of energy
Why is energy important?
It makes things move and grow.
It is required to make things happen.
What is potential energy?
Energy which can be change to different types.
Energy stored in an object due to its position.
What is heat energy?
Energy that is possessed by all hot objects.
Energy which is hot
What is chemical potential energy?
Energy held in bonds between atoms.
Energy from chemicals
What is kinetic energy?
Energy from stationary objects
Energy possessed by all moving objects.
What is a Watt?
A unit of power
What is electrical energy?
Currents in electric.
Energy carried by moving charges
Gravitational potential energy?
Energy possessed by all objects, which are high up
Energy in falling objects
What is elastic potential energy?
Energy in rubber bands
Energy stored in squashed or stretched objects
What is nuclear potential energy?
Energy stored in the nucleus of an object.
Energy in radioactive materials
When would an object have more kinetic energy?
When it increases speed
When it slows down
Why is heat energy a type of kinetic energy?
Because fire moves
Because it is due to the movement of particles, which speed up when an object is heated.
What is radiant energy?
Energy carried by electromagnetic waves like light and xrays.
Energy that is radiant
1 Kilo Joule is equal to...
1000 Joules
100 Joules
1 calorie is equal to...
4 kilo Joules
4.2 kilo Joules
How to interpret constant speed?
Equal distance in equal interval of time
The graph is bent
How to interpret accelerating graph?
Unequal distance in equal interval of time
Straight graph
Energy input=_____ energy+_______ energy
Useful and waste
heat and chemical
How to find the energy efficiency of something?
Divide by 5 then times 100
Useful energy output divide total energy input times 100 and answer is in %
How to find distance with speed and time?
Speed divided by time
Time divide by speed
How to find time with distance and velocity?
Distances divide by velocity.
Times distance by velocity
What is the conservation of energy law?
Energy can neither be created or destroyed but it can be changed from one form to another (or passed between objects)
Energy cannot be over used
