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A physical variable is something that
is measurable and can change
A unit used to measure energy –
joule
Energy of motion –
Kinetic
Energy is the ability to
do work or make a change
Stored energy is
potential energy
What do all forms of energy have in common?
the ability to cause changes to a system
What variables affect the increase or decrease of energy in a system?
temperature, speed, position, pressure and motion
When one type of energy changes to another type of energy –
energy transformation
Potential energy and kinetic energy combined are classified as –
mechanical energy
If a student is about to release a ball and let it drop, the ball has –
potential energy
When a roller coaster car is at the top of a steep slope, it has _______ potential and _________ kinetic energy. (high or low)
high potential, low kinetic
Potential or Kinetic: a train moving on tracks
kinetic
Potential or Kinetic: a purse sitting on a chair
potential
Potential or Kinetic: an apple on the table
potential
If a red ball is dropped from a height of 3 feet and a blue ball is dropped from a height of 6 feet, which ball has greater potential energy?
blue ball
If an object has 39 joules of potential energy and 41 joules of kinetic energy, what is the total energy of the object?
80 joules
