Forms of Energy
This type of energy is the energy of motion.
Kinetic
Almost all energy on Earth originates from this.
The Sun
What is the unit for work
Joule
At the top of a roller coaster hill, the energy that is greatest.
Potential energy
A 3 kg book sits on a 2-meter-high shelf.
Calculate its gravitational potential energy.
58.8 J
This type of energy is described as stored energy.
Potential energy
The Law of Conservation of Energy states energy is neither this nor this
What is the unit for power.
Watt
At the bottom of a hill, this type of energy is greatest.
kinetic energy
A 2 kg ball is rolling at 4 m/s.
Calculate its kinetic energy.
16 J
Energy stored in a compressed spring is this type of potential energy.
Elastic potential energy
Energy stored in the nucleus of an atom is this type of energy.
Nuclear energy
If you push a wall and it does not move, the amount of work done is this.
Zero
At which point on a roller coaster does the cart have equal amounts of potential and kinetic energy?
halfway down the hill
You push a box with 50 N of force across the floor for 3 m.
How much work is done?
150 J
Energy stored in the bonds between atoms is known as
Chemical potential energy
Photosynthesis transforms this type of energy into chemical energy.
Light energy
Simple machines change these two things about a force.
magnitude and direction
As speed increases, kinetic energy increases with mass and this.
velocity
A rock is dropped from 5 m.
Calculate its velocity just before it hits the ground.
9.9 m/s
At the molecular level, thermal energy is actually this type of energy.
Kinetic energy
During cellular respiration when a lion runs, energy transforms from this type to kinetic energy.
Chemical energy
This is the maximum efficiency possible for a perfect machine
100%
In the real world, “lost” energy in a roller coaster becomes this form.
heat (thermal energy)
A 0.15 kg ball is thrown upward at 20 m/s.
How high will it go?
20.4 m