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Study guide and extra help videos on the canvas agenda. PRACTICE THE MATH AND REVIEW PAST QUIZZES!!! The formulas that will be provided on the test: F= ma W=Fd P=W/t KE= 1/2mV2 GPE=mgh Good luck on the test! :)
Energy is…
the ability to do work
Work is done when…
a force is applied to move an object. The object must move in order to be doing work and the object must move in the same direction of the force.
How do you measure energy and work?
Joules (J)
How is work calculated?
by multiplying the force applied by the distance that an object moves.
How is force measured?
Newtons (N)
How do you measure gravity?
multiply by 9.8
How to turn lbs into kg?
divide by 2.2
Power is the rate…
at which work is being done and is measured in Watts (W)
Power is calculated by…
dividing the work by the time taken to do the work.
P= W/t
Law of conservation of energy states that
energy cannot be created or destroyed, but simply transferred from one object to another or converted from one form to another.
An example of Law of conservation of energy
strike a match and its chemical potential energy is converted into heat and light energy.
What happens when energy is transferred or converted?
it is inevitable that some of the energy is converted into wasted heat energy due to friction of the moving parts.
The two major categories of energy are…
kinetic and potential
Kinetic energy (KE) is…
energy due to the mass and movement of an object.
Potential energy (PE) is….
appears in many different forms, and is defined as the energy in matter due to its position or the arrangement of its parts.
Gravitational Potential Energy (GPE)…
appears in many different forms, and is defined as the energy in matter due to its position or the arrangement of its parts.
GPE depends on…
the mass of the object, the height above the ground, and the pull of gravity.
Elastic Potential Energy (EPE)
A stretched rubber band has the potential to do work or change things.
Chemical Potential Energy (CPE)
The energy stored in molecules
A battery has chemical potential energy which is then converted into
Electrical Energy (EE)
Thermal Energy (TE)
The movement of molecules that make up the object.
Light Energy (LE)
is an example of electromagnetic energy.
Sound Energy is made up of…
vibrations of matter.
Thermal Energy consists of…
moving molecules in air or in an object.
Mechanical energy
is the combination of kinetic and potential energy of a moving object.
How do we create electrical energy from fossil fuels?
By burning gas, we create heat which powers a turbine. The rotation of this turbine spins a generator which creates electricity.
Note
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