Energy Basics
The ability to do work or cause change.
What is energy?
This type of energy is due to motion.
What is kinetic energy?
This is what potential energy is.
What is stored energy?
PE changing into KE
What is a common energy transformation when an object falls?
The energy of moving charges, like in a circuit.
What is electrical energy?
The SI unit for energy and work
What is a Joule?
The two factors that affect kinetic energy
What are mass and speed?
The type of potential energy due to an object's height.
What is gravitational potential energy?
The Law of Conservation of Energy states that energy cannot be ______ or______.
What are created or destroyed?
This energy form is associated with the random motion of atoms and molecules; often felt as heat.
What is thermal energy?
This is the symbol used for kinetic energy in formulas.
What is KE?
A 5 kg object moving at 2m/s has this much kinetic energy.
What is 10 Joules? (KE= 0.5*5* 22=10J)
A 10 kg object 5 meters high has this much gravitational potential energy on Earth( Use g= 9.8 m/s2)
What is 490 Joules? (GPE= 10 * 9.8 *5= 490J)
When a flashlight is turned on, chemical potential energy in the battery transforms into these two main forms.
What are electrical energy and light energy (and also thermal energy)?
Energy carried by vibrations through a medium.
Whta is sound energy?
If you double an object's speed, its kinetic energy will increase by this factor
What is four (or 2 squared)?
The formula used to calculate kinetic energy.
What is KE= 1/2 mv2?
The type of stored energy found in a stretched rubber band or compressed spring
What is elastic potential energy?
At the very top of its swing, a pendulum has maximum potential energy and minimum of this energy.
What is kinetic energy?
This form of energy is released when atomic nuclei are split or combined.
What is nuclear energy?
Mass must be in kilograms and speed in meters per second for the KE formula to correctly yield this unit.
What is Joules?
A 0.2 kg baseball is thrown with 50 J of kinetic energy. This is its speed.
What is 22.36 m/s (approx.)?
The three main factors that determine an object's gravitational potential energy.
What are mass, gravity and height?
This describes what happens to the total amount of energy in a closed system, even as it changes forms.
What is it remains constant?
The energy from the sun that travels in electromagnetic waves.
What is light energy(or radiant energy)?