Potential Energy
Potential energy is _ energy.
Stored
Kinetic energy is energy an object has due to its _.
position
When you plug a tv in it transforms _ energy to _ energy.
Electrical; sound/light
What are the two types of energy?
Potential and kinetic
The formula for kinetic energy is KE= 1/2mv2. What do m and v stand for?
mass; velocity
This is energy due to position or place.
Gravitational energy
This is energy due to the movement of objects from one place to another.
Mechanical energy
When you plug in a toaster it turns _ energy into _ energy.
Electrical; thermal
Energy is the ability to do _.
work
If the formula for kinetic energy is 1/2mv2, what is going to affect an objects kinetic energy more? M or v?
v (velocity)
This is energy stored in objects by tension.
Stored mechanical energy (elastic energy specifically)
This is a type of energy when atoms/molecules vibrate to cause heat.
Thermal energy
When you eat food and then go for a bike ride you are turning _ energy into _ energy.
Chemical; mechanical
Energy makes matter _ or _.
Move; change
The formula for potential energy is P= mgh. What does the g stand for? Specifically what number with units?
gravity= 9.8 m/s2
This is energy stored in the bonds of molecules.
Chemical energy
This is the term for the type of energy when light travels in transverse waves.
Radiant (or electromagnetic) energy
When you plug in a generator because your power went out you are turning _ energy into _ energy.
mechanical; electrical
What are the units for energy?
Joules
If an object weighs 2kg and is at height of 10m, what is its potential energy? (don't forget units!)
P= mgh
P= (2kg)(9.8m/s2)(10m)
P= 196 joules
This is energy stored in the nucleus of an atom.
Nuclear energy
Name both of these types of energy:
Energy from the flow of an electric charge (electrons moving in one direction)
Energy that travels in longitudinal waves
Electrical energy; sound energy
When you turn on a flashlight you are turning _ energy into _ energy.
Chemical; electrical/radiant
What is the name of the law that describes how energy cannot be created or destroyed?
The Law of Conservation of Energy
What is the Kinetic Energy of a 150 kg object that is moving with a speed of 15 m/s?
KE = ½ (150kg) (15 m/s)2
KE = ½ (150kg)(225)
KE = 16,875 J