Energy
What is energy?
- The ability to cause change
What are the two things that kinetic energy depends on?
- Mass
- Speed
- Mass
- Height
What is the 1st Law of Conservation of Energy?
- Energy can neither be created nor destroyed, it can only be TRANSFORMED
What is the mechanical energy formula?
ME = PE + KE
What are the two main types of energy?
- Kinetic & Potential
If there are two objects with the same mass moving at a slow and a fast speed, which one will have more kinetic energy when moving?
- The faster one
What is gravitational potential energy?
- Pulls an object towards Earth's center
What is the formula for gravitational potential energy?
GPE = Weight x Height
What is kinetic energy and its formula?
- The energy of motion
KE = 1/2 x Mass x Speed^2
In which units is energy measured in science?
KE = mass x speed
kg x m^2/s^2 = JOULES (J)
What is elastic potential energy?
- Energy associated with objects that can be compressed or stretched
Fill in the Si Unit Table:
FORCE -
HEIGHT -
WORK -
MASS -
ENERGY -
FORCE - Newton
HEIGHT - Meter
WORK - Joule
MASS - Kilogram
ENERGY - Joule
Compare and contrast nuclear fission and nuclear fusion
FISSION: Releases energy when a nucleus splits apart
FUSION: Releases energy when nuclei join together
BOTH: Release energy stored in the nucleus of atoms
What is potential energy?
- Stored energy an object has due to its position or chemical composition
What is force measured in?
Newtons
What is chemical energy?
- Energy stored in food = results between the bonds between atoms
What is mechanical energy?
- Motion AND position
What is thermal energy?
Total kinetic and potential energy of the particles in an object
What is work? What is power and its formula?
Work = the transfer of energy
Power = Energy Transferred/Time
Power = Work/Time
What is the kinetic energy equation?
KE = 1/2 mv^2
- Gravitational
- Elastic
What happens to gravitational potential energy as mass of an object increases?
Increases
What is electrical energy? What is electromagnetic energy?
- Energy of electrical charges
- The light you see = radiant energy