Fizix Is Phun Lab Day @ Great Escape
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Transcript of Fizix Is Phun Lab Day @ Great Escape
Fizix Is PhunFizix Is PhunLab Day @ Great Lab Day @ Great EscapeEscape
Fizix Is PhunFizix Is PhunLab Day @ Great Lab Day @ Great EscapeEscape
Hints and Other Useful TriviaHints and Other Useful Trivia
General Protocols• Must be in homeroom on time• We leave at __________
– no call-down
• Gates open at 10:00• Mandatory Check-In @ Lunch
– 12:00 to 1:00– Check-In at __________
• Bus leaves at _________
Pre Prior Planning…• Protractor Elevation Device
– Make it– Practice with it
• For each page– What data must be collected– How can it be collected– Who will collect it
• Where possible– answer theory questions– prepare equations
Suggestions, etc.• Pre Prior Planning…• Gather all data first, then do
calculations– I'm at the check-in for questions
• Pack will be collected when the bus arrives back at the school
• Lunch, Lockers• Items Due in class on _______
• pre-assignment• signed permission slip
Boomerang 1• “Should” implies friction free
– Consider KE PE conversions
• “Is” means in reality– time the car’s length passing the
final point or
– vf from v=d/t formula
• Friction (Ff) causes lost acceleration
F
F
ma
mg
a
gf
N
lost lo st
Boomerang 2• free body diagram forces
– weight– force due to motion (circular)
• minimum speed causes vertical forces to be in balance at top of loop
Canyon Blaster• be sure to use the central loop• estimate distance via
– distance between supports– # supports in circle
• use vertical poles as reference
Canyon Blaster
Comet 1• use protractor as a protractor• classical calculations
– v=d/t– PE=mgh– Work Energy Theorem– W=Fd
Comet 2• Think KE PE• "Should" means friction free• "Is" means actual• velocity: time how long it
takes for the train to move its own length
Comet 3• heed the assumption about
lost energy• knowing KE yields v
• FC and g-forces
Comet 4• watch carefully• time train moving its own
length before the brakes are applied
• time how long the brakes are used
Steamin' Demon 1• use protractor as a protractor• classical calculations
– v=d/t– PE=mgh– Work Energy Theorem– W=Fd
• Note: Demon1 or Comet1, not both
Steamin' Demon 2• “Should” implies friction free
– Consider KE PE conversions
• “Is” means in reality– time the car’s length passing the final
point
– vf from v=d/t formula
• Friction (Ff) causes lost acceleration
• Note: Demon2 or Boomerang1
Steamin' Demon 3• free body diagram forces
– weight– force due to motion (circular)
• minimum speed causes vertical forces to be in balance at top of loop
• Note: Demon3 or Boomerang2
Steamin' Demon 4• 2 rides required• greatest force
– in or out of seat– top of loop or bottom
• greatest "rush"
Flying Trapeze 1• Finding FC via balanced forces
• the chain doesn't change length– rest length becomes hypotenuse
• balance the forces– FT in chain
– FC horizontal
– mg vertical
Flying Trapeze 2• Finding FC via circular
• the chain doesn't change length– rest length becomes hypotenuse
• find circumference / radius• find period of revolution
High Divers 1• Comparing Processes
– KE PE energy conversions– classical (timed) free-fall
• know R%E formula
High Divers 2• Must do High Divers 1• classic acceleration• grand scale approximation w/
unit conversion
The Merry-Go-Round• radius
– via circumference – distance from outer edge
• FC calculations
• Ride twice for comparison• Work & Power
Pirate Ship• just a big pendulum• meaning of "weightless"• μ similar to Boomerang1
Water Tube Rides• need only do 1 of 4
• vf is the same for similar vertical drops regardless of path
• for #5, I suggest v=d/t• μ similar to Boomerang1
Wave Pool• try to visualize a stop action picture• watch from one side, use partner as
a marker• grand scale approximation
– pool is not rectangular– length between depths by pacing sides– width by pacing thru water– volume of a trapezoid solid