Embed Size (px)
Citation preview
EnergyLesson Goal: Explain the different forms of energy that are present while on a roller coaster and what those forms of energy turn into. At the Bell: Pick up the worksheet at the front of class and complete the warm up questions.
Warm Up
1) What is energy?
2) How many forms of energy can you name?
3) How do Humans get their energy?
What is energy?Energy
◦It’s the ability to do work (move something)◦Law of Conservation of Energy:
Energy is never created or destroyed, but is changed from one form into another.
◦Total amount of energy in a system is CONSTANT—it stays the same.
What are the different forms of energy?Energy can be present in different
forms of energy or a combination of forms.
MechanicalChemicalElectricalThermalLightSound
Mechanical EnergyMechanical energy: energy due to
the position of something or the movement of something.
Types of Mechanical Energy:
Potential energy (PE): stored energy
Kinetic energy (KE): energy of motion
Potential EnergyPotential energy is stored energy3 types of PE
◦Elastic Potential Energy Stored energy when a material is
stretched or compressed Ex: Rubber Band or spring
◦Chemical Potential Energy Energy stored in the bonds between
atoms Ex: Energy stored in food Ex: Energy stored in batteries
Gravitational Potential Energy
Depends on the height and mass of an object.
Stored energy due to position of an object
Higher up = more potential energyMore mass = more potential
energy
PRACTICE TIME! For the following pictures, name what
type of potential energy is present:
Kinetic EnergyKinetic energy is the energy of
motion. If an object is moving, then it has
kinetic energy. The faster an object is moving, the
more kinetic energy it has.In most situations, as kinetic
energy increases, potential energy decreases.
PRACTICE TIME!!!In the following situation, tell me
when the object will have the:◦Least KE◦Most KE◦Least PE◦Most PE
As Kinetic Increases, Potential Decreases
What kind of energy does the sled have at the top of the hill before it starts moving?
As the sled goes down the hill, what does that energy turn into?
Roller Coaster Energy: You Will Be Making This Next Week
PE can be converted to KE and back to PE
Watch the animation and explain the transformation of energy.
In The Real World…
If a roller coaster goes down the first hill would it continue to go on forever if the track kept going?
Electrical EnergyEnergy made available by the movement of
electrons through a conductor (wire).We can make electric energy by converting
another energy form into electricity:◦Solar Panels◦Windmills◦Generators◦Chemical
Where Does Michigan Get It’s Energy From?
Chemical EnergyChemical energy is a type of energy
that is stored in chemical bonds and can be converted into other forms…
Examples◦ Batteries store chemical energy◦ Your body stores energy from food as
chemical energy◦ Photosynthesis
Plants use energy from the sun to make sugar. Energy is stored in the bonds of the sugar
Other Forms of EnergyThermal
◦Heat◦Friction can cause KE to be converted to
thermal energyLight
◦Energy associated with electromagnetic waves Sun gives us light energy Solar Panels
Sound◦Noise is actually a form of energy
Tomorrow: Energy Transformations & Design Day for Roller Coasters
Humans have created inventions to turn one form of energy into another to better our lives. Examples of these are:◦Light Bulbs◦Motors◦Air Conditioners◦Heaters ◦Roller Coasters◦The list goes on and on…
Energy Transformations Warm Up:List the 6 main types of energy that we talked
about yesterday:◦ Mechanical ◦ Thermal (Heat)◦ Light (Radiant)◦ Electrical◦ Chemical◦ Sound
The whole point of producing energy is to turn it from one form into another…these are ENERGY TRANSFORMATIONS.
The ways we produce electricity are varied but all rely on energy transformations.
Examples of Energy Transformations
1) Toaster
2) Fan
3) Lighter
4) Windmill Producing Electricity
5) A Dam Producing Electricity
Examples of Energy Transformations
6) When you drop a book and it is falling, what kind of energy does the book have?
7) What is the energy transformation when gasoline powers a car driving down the road?
Examples of Energy Transformations
8) What is the energy transformation when you eat some pasta before you run a marathon?
9) What is the energy transformation of dynamite exploding?
Examples of Energy Transformations
10) A Solar Panel
11) Burning Coal for Energy
Examples of Energy Transformations
12) Going Up and Down on a Skateboard Ramp?
13) What is the energy transfer of lighting a lighter?
