Types of Energy
Energy in motion
Kinetic
Does energy transfer mean?
When energy is transferred from one object to another, but the type of energy remains the same.
What is the formula for Kinetic Energy?
1/2 x mass x velocity (squared)
Why does GPE increase when you lift an object higher above the ground?
Because H is in the formula.
When measuring Kinetic energy, what unit do you use for mass?
KG
The type of energy that comes from something hot
Thermal
Is the definition of energy?
An objects ability to do work.
mass x gravity x height
How do we know if a lightbulb is more energy efficient?
Less heat as on output.
What is the main energy output for a light bulb?
Light
Chemical
Is waste energy?
The output energy which is NOT useful.
Is the number we use for gravity when measuring GPE?
9.8
Does some food give off more thermal energy when set on fire.
More stored chemical energy.
Give two examples of stored chemical energy
Food and batteries
Energy that is stored when something is stretched
Elastic
Does energy transformation mean?
When energy goes from one object to another, AND the type of energy changes.
What unit do we use to measure energy?
Joules
Are energy chains important
Shows us the transfer of energy when completing tasks.
What are the two things that kinetic energy depends on?
Mass and velocity
Energy that travels through vibrations of particles.
Sound
Is the law of conservation of energy?
Energy cannot be created or destroyed, only transferred.
What is the formula for velocity?
Distance / Time
What is the energy transformation when you move your body, and hit a ball (starting from within your body).
Chemical - Kinetic
What energy transformation occurs when you turn a light bulb on, and what is the wasted energy?
Electrical - Light (heat as waste)