Kinetic Energy
What is kinetic energy
energy of motion.
What is potential energy
Stored energy to be used later
What is energy?
The ability to do work
Define energy efficiency.
a measure of how much useful work we can get from each unit of energy we use.
David's father has three sons: Snap, Crackle, and _____?
David
What are the different types of Kinetic energy
Light energy, sound energy, heat energy, electrical energy and kinetic energy.
What are the different types of potential energy
Chemical, gravitational and elastic
What is the unit of measurements for Energy?
what is Energy INPUT and OUTPUT?
Energy INPUT is the amount of energy in Joules that has been put into an object. Energy OUTPUT equals the same amount of energy that has been put into the object but separated into the energies that come out of that object.
What can run, but never walks; has a mouth, but never talks; has a head, but never weeps; has a bed, but never sleeps?
A river
Explain which form of energy is captured by wind turbines.
Kinetic energy from the wind
A piece of wood placed onto a fire has what type of energy?
Potential Chemical energy
When energy changes from one form to another, we call it a
Transformation
Explain the difference between useful energy and wasted energy? Give an example.
Useful energy is the energy of an object that is used to make something happen but wasted energy is energy that is used which does not help the object work and is lost.
What day would yesterday be if Thursday was four days before the day after tomorrow?
Friday
What is the energy of moving particles through a wire?
Electrical energy
In the equation E(p) = m x g x h , E(p) is:
Potential gravitational energy
What is the law of conservation of energy
Energy cannot be created or destroyed.
What is the equation to work out the energy efficiency of something?
Equation is: The useful energy output divided by the energy input times by 100%.
What month of the year has 28 days?
every one of them
What is the formula for kinetic energy?
KE = 0.5 * mv²
Identify the three ways to change an object's shape and, therefore, elastic potential energy.
Compressing stretching and twisting
Most of our energy on Earth originates from ...
the sun
A child jumping on a bed converts 1000 J of stored elastic energy into 800 J of useful kinetic energy.
Calculate the energy efficiency of the jump.
80%
What comes down but never goes up?
rain