Types of Energy
Define Kinetic Energy
Energy of mass in motion AKA something moving.
Turning on a light bulb
Electrical --> Light and Heat
If a lightbulb has a total output of 90j and 10j is used as light. How much is used in heat energy?
80j
Shooting of a bow an arrow
Potential
What is an independent variable?
The variable that is changed or controlled
Define Gravitational potential energy? (Must include mass and height)
The energy stored in an object based on its height and mass
A car moving down the road
Chemical --> Kinetic/heat/light
Calculate the percentage efficiency of a motor that does 120 J of work from 240 J of electrical energy
Useful output/Total output x 100
50%
A roller coaster at the top of the highest point.
Define dependant variable?
Define Sound energy?
Type of energy created by vibration, which causes movement in air particles.
Charging a phone while using it.
Electrical --> Chemical --> light/heat/sound
In the process of energy transformation, what type of energy is some out the output always lost to?
Heat
Moving car
Kinetic
What are the four indigenous fire starting methods?
Fire plough, Fire Drill, Fire Saw, and Percussion Method
What is the other name for heat energy?
Thermal
Identify the type of energy that is used to boil water and drive a steam turbine to generate electricity in the energy chain
Heat Energy --> ? --> Electrical Energy
Kinetic Energy
What is the law of the conservation of energy?
That energy cannot be created or destroyed but it can be changed from one form to another.
Light bulb turning on
What are the three components of a risk assessment?
The item, potential hazard/risk and management
What are the 4 types of Potential Energy?
Gravitational, Chemical, Elastic and Nuclear
Winding up a toy car to make it move.
Kinetic --> Elastic Potential --> Kinetic
If a car has a total energy output of 350j, and 225j is used as kinetic energy, how much is used as heat energy?
125j
What is the difference between the 2 main groups of energy, Kinetic and Potential energy?
Kinetic (action/working)
Potential (stored)
Explain the difference between independent and dependent variable.
Independent variable - the variable that is changed or controlled.
Dependent variable - outcome dependent on the independent variable