General
Something needed to do any work.
Energy
Define Kinetic energy
Energy a moving object has
Define potential energy
Energy stored in an object due to its position.
Give an explanation for a person hammering a nail.
When is there potential/ kinetic energy?
The raised hammer has potential energy since it can go higher or lower. When you hit the hammer on the table, the stored potential energy is converted to kinetic energy as the hammer is falling.
The two branches of energy
potential and kinetic
True or false: Kinetic energy is greater in heavier objects.
True
When is potential energy greatest and least on a roller coaster?
What energy does a rock have when its sitting at the edge of a cliff? Explain how the energy changes as it falls.
A rock sitting on the edge of a cliff has potential energy. If the rock falls, the potential energy will be converted to kinetic energy, as the rock will be moving
What does the law of conservation of energy suggest?
Energy cannot be created nor destroyed
What are the forms of kinetic energy?
Light, thermal, sound, electrical, and mechanical.
What are the forms of potential energy?
Chemical, gravitational, elastic, and nuclear.
As energy transfers and transforms, does the amount of energy change or stay the same.
Stay the same (law of conservation of energy).
Explain the difference between energy transformation and energy transfer.
Energy transfer is the movement of energy from one location to another. Energy transformation is when energy changes from one type to another.
What is kinetic energy directly related to?
The mass of the object and the square of its velocity.
A spring has _______ potential energy when stretched or compressed.
More.
How to potential and kinetic energy relate to rockets?
When the rocket is at rest (grounded), the potential energy is at it's greatest. When in movement, the kinetic energy would be at it's greatest.
What is the unit for energy?
Joules (J)
In which fundamental state of matter is kinetic energy the greatest?
What is potential energy directly related to?
Mass and height.
Describe the energy transformation when you eat an apple then go on a walk
When the apple is broken down, the body transfers energy from chemical energy to thermal and mechanical energy.