what puts the thrill in a thrill ride?
DESCRIPTION
What puts the thrill in a thrill ride?. Show videos of Cedar Point roller coasters. What puts the thrill in a thrill ride?. Kinetic Energy. The energy of motion is called kinetic energy. I think of kinetic energy as the hurt factor. Kinetic Energy. Kinetic Energy. Kinetic Energy. - PowerPoint PPT PresentationTRANSCRIPT
What puts the thrill in a thrill
ride?Elizabeth Buckholtz Toledo Public Schools
• Show videos of Cedar Point roller coasters.
Elizabeth Buckholtz Toledo Public Schools
What puts the thrill in a thrill ride?
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
• The energy of motion is called kinetic energy.• I think of kinetic energy as
the hurt factor.
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
K.E. = mass x velocity2
2
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
K.E. = mass x velocity2
2
20 grams 10 mi/h.02 kg 4.5 m/s20.25 m2/s2.4 kg m2/s2
.2 kg m2/s2.2 Joules
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
K.E. = mass x velocity2
2
3.5 kg 4.5 m/s20.25 m2/s270.875 kg m2/s235.45 kg m2/s235.45 Joules
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
• .2 Joules • 35.45 Joules
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
•The greater the mass of a moving object, the more kinetic energy it has.
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
Elizabeth Buckholtz Toledo Public SchoolsAroldis Chapman
Kinetic Energy
K.E. = mass x velocity2
2
.15 kg 45 mi/h400 m2/s260 kg m2/s230 kg m2/s230 Joules
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
K.E. = mass x velocity2
2
.15 kg 100 mi/h45 m/s2025 m2/s2304 kg m2/s2152 kg m2/s2152 Joules
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
• 30 Joules • 152 Joules
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
• The faster an object moves, the more kinetic energy it has.•Kinetic energy depends on
both mass and velocity.
Elizabeth Buckholtz Toledo Public Schools
Kinetic Energy
K.E. = mass x velocity2
2
Elizabeth Buckholtz Toledo Public Schools
Potential Energy
• Potential Energy is stored energy.– Stored chemically in fuel, the nucleus of atom, and
in foods.– Or stored because of the work done on it:• Stretching a rubber band.• Winding a watch.• Pulling back on a bow’s arrow.• Lifting a brick high in the air.
Elizabeth Buckholtz Toledo Public Schools
Gravitational Potential Energy
• Potential energy that is dependent on height is called gravitational potential energy.
Elizabeth Buckholtz Toledo Public Schools
Gravitational Potential Energy
• The formula to find G.P.E. isG.P.E. = Mass X Height x Gravity.
Elizabeth Buckholtz Toledo Public Schools
9.8m/s2
Gravitational Potential Energy
a marble on your desk
G.P.E. = Mass X Height X 9.8 m/s2.02 kg 1 m
.2 JoulesElizabeth Buckholtz Toledo Public Schools
Gravitational Potential Energy
a marble on the Empire State Building
G.P.E. = Mass X Height X 9.8 m/s2.02 kg 443 m
87 JoulesElizabeth Buckholtz Toledo Public Schools
Gravitational Potential Energy
• .2 Joules • 87 Joules
Elizabeth Buckholtz Toledo Public Schools
Gravitational Potential Energy
•The higher an object is, the more gravitational potential energy it has.
Elizabeth Buckholtz Toledo Public Schools
Gravitational Potential Energy
A bowling ball on the Empire State Building
G.P.E. = Weight X Height X 9.8 m/s23.5 kg 443 m
15,000 JoulesElizabeth Buckholtz Toledo Public Schools
Gravitational Potential Energy
• 87 Joules • 15,000 Joules
Elizabeth Buckholtz Toledo Public Schools
Gravitational Potential Energy
•The more an object weighs, the more gravitational potential energy it has.
Elizabeth Buckholtz Toledo Public Schools
Gravitational Potential Energy
•“The bigger they are the harder they fall” is not just a saying. It’s true. Objects with more mass have greater G.P.E.
Elizabeth Buckholtz Toledo Public Schools
Energy Transformations
•Most forms of energy can be transformed into other forms.• One of the most common
transformations is between potential and kinetic energy.
Elizabeth Buckholtz Toledo Public Schools
Energy transformations (falling objects)
maximum heightmaximum GPE
heightdecreasing
velocity increasing
Height 0 meters
GPEdecreasing
KEincreasing
GPE0 Joules
has a little KE
maxium velocitymaximumKEElizabeth Buckholtz Toledo Public Schools
Energy transformations (falling objects)
• Where did all that KE come from?• As the water fell,
PE was converted to KE.
Elizabeth Buckholtz Toledo Public Schools
Energy Transformation(object thrown upward)
height increasingPE increasing
maximum heightmaximum PE
very littleheightvery little PE
Velocity isdecreasingKE decreasing
balanced forceball does not movenoKE
velocityincreasingKEincreasing
maxvelocitymaxKEElizabeth Buckholtz Toledo Public Schools
Energy Transformation(object thrown upward)
• As objects fall potential energy is transformed to kinetic energy.
• An object has maximum potential energy at the top of it’s path.
• As an object falls potential energy is transformed into kinetic energy.
• A moving object has maximum kinetic energy at the lowest point of it’s path.
Elizabeth Buckholtz Toledo Public Schools
Conservation of Energy
•Energy can not be created or destroyed, it changes forms.
Elizabeth Buckholtz Toledo Public Schools
Kinetic-Potential Energy Conversion
Roller coasters work because of the energy that is built into the system. Initially, the cars are pulled mechanically up the tallest hill, giving them a great deal of potential energy. From that point, the conversion between potential and kinetic energy powers the cars throughout the entire ride.
Elizabeth Buckholtz Toledo Public Schools
• Show videos of student roller coasters
Elizabeth Buckholtz Toledo Public Schools
Roller Coaster Challenge
• You are going to be working in teams to build a roller coaster– 12 feet of pipe insulation– 1 marble– Tape
• Requirements– Two hills– 1 trick (corkscrew, loop, twist, etc)
Elizabeth Buckholtz Toledo Public Schools
Roller Coaster Challenge
• Get into your groups.• Plan your roller coaster.• Draw a diagram.• Diagram must include– Name of roller coaster– Place of maximum gravitational potential energy– Place of GPE transforming into kinetic energy– Place of maximum KE (assuming ideal conditions)
Elizabeth Buckholtz Toledo Public Schools
Example Diagram
Elizabeth Buckholtz Toledo Public Schools
Roller Coaster Challenge
• Present designs
Elizabeth Buckholtz Toledo Public Schools
Build Roller Coasters
• minimum three days• students keep a journal–At the end of every day they record •problems encountered & solutions•design changes and why•Observations
Elizabeth Buckholtz Toledo Public Schools
Sample Journal Entry
Elizabeth Buckholtz Toledo Public Schools
Roller Coaster Derby Day• Each group presents their roller coaster.• Tell the name• Tell the features, including measurements• Points out point of – Highest GPE– Highest KE– Place where GPE is transforming to KE
• Answer questions• Run coaster• Videotape if possible.
Elizabeth Buckholtz Toledo Public Schools
Sample Roller Coaster
Elizabeth Buckholtz Toledo Public Schools
Roller Coaster Derby Day
• Use graph paper to draw a scale diagram of their final roller coaster.
• Label points of – Greatest GPE– Greatest KE– Transformations between GPE and KE
Elizabeth Buckholtz Toledo Public Schools
Sample Graph
Elizabeth Buckholtz Toledo Public Schools
Assessment
• Use rubrics.• Original design• Journal• Team work and productivity (can be self and
peer assessed)• Final roller coaster• Diagram
Elizabeth Buckholtz Toledo Public Schools
Assessment
• Class choice – which roller coaster they would most want to ride.
• Longest drop• Highest hill• most tricks
Elizabeth Buckholtz Toledo Public Schools
Other topics
• Accelerations– Positive– Negative– Centripetal
• Average speed• Distance• Displacement• Newton's laws of motion
Elizabeth Buckholtz Toledo Public Schools
Version 2 updated 8/9/12 (fixed spacing, labeling and 1 decimal error)
Elizabeth Buckholtz Toledo Public Schools
references
• http://www.google.com/search?aq=f&sourceid=chrome&ie=UTF-8&q=effect+of+mass+on+kinetic+energy#sclient=psy&hl=en&source=hp&q=powerpoints+potential+kinetic+energy&pbx=1&oq=power+points+potential&aq=1jl&aqi=g-jl2&aql=&gs_sm=c&gs_upl=17026l23405l0l26142l22l20l0l1l1l0l347l3629l0.12.5.2l19&bav=on.2,or.r_gc.r_pw.&fp=4314f23e9084643a&biw=1366&bih=600
Elizabeth Buckholtz Toledo Public Schools