6 Flags Lab Name _________________ Your Mass ______________ Date_________ Directions: 1.You will complete the background section of this lab by explaining the following physics concepts a.Weight vs. Mass vs. Apparent mass b.Newton’s Second Law (free body diagrams, net force, acceleration) c.Conservation of energy (overall concept and individual types of energy) d.Circular motion (include a diagram of Fc, ac, and velocity vectors) 2.For each section above, you will include the following a.All formulas, variables,and their units b.Any concepts that govern that topic c.Any diagrams that you feel are necessary to help your explanation 3.For each calculation you will a.Show the formula b.Show a substitution with units c.Show an answer with units 4.This will count as a TEST grade On task in class (15 pts) On time in the morning (5 pts) On time in the park to hand in (5 pts) Background (10 pts) Kinda ka (13 pts) Batman (17 pts) Merry-go-round (14 pts) El Toro (16 pts) On time to the bus (5 pts) TOTAL POINTS (100)

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1. Kingda Ka (13pts) Max height (d y ) : 139m Your mass___________ 1.Assuming that you stop for a split second at the top of the hill, what is your gravitational potential energy at the top? [2] 2.Assuming negligible friction, what kinetic energy must be provided by the launch system? [1] 3.What is the speed of the train after launch? [2] 4.What is the acceleration of train during the launch?[2] 5.How many Gs is that acceleration? (remember 1G is 9.81m/s 2 )[1] 6.How long is the launch section of the track in meters (d x )?[2] 7.How much work must be done to accelerate the train? [1] 8.What net force does the launch system supply on the train? [2] dxdx dydy Launch time = _________s

2. Batman (17pts) Loop Radius (r) : 10m Max height: 30m Your mass___________ 1.Assuming that you stop for a split second at the top of the hill, what is your gravitational potential energy at the top? [2] 2.Assuming negligible friction, what is the speed of the train at the bottom of the first hill? [2] 3.What is your potential energy at the top of the loop? [2] 4.What is your kinetic energy at the top of the loop? [2] 5.What is you speed at the top of the loop? [2] 6.What is the centripetal force acting on you at the top of the loop? [2] 7.Draw a free body diagram of the forces acting on you when you are at the top of the loop [3] 8.What is your apparent weight (F N ) at the top of the loop? [2] Max height

3. Merry Go Round (14pts) Your mass___________ 1.Pick an animal on the outside of the ride and determine the radius of the circle you will be completing (1 long stride = 1m) [1] 2.Allow the ride to speed up, then determine the period of the rotation. [1] 3.What is the average speed of the ride? [2] 4.What centripetal force is required to keep you in that circle? [2] 5.What would happen to the period of the motion if you chose an animal closer to the center of the merry-go-round? EXPLAIN [1] 6.What would happen to the radius of the motion if you chose an animal closer to the center of the merry-go-round? [1] 7.What would happen to your speed if you chose an animal closer to the center of the merry-go-round? EXPLAIN [2] 8.Compare the centripetal force felt by a rider on an outside animal to the centripetal force on a rider on an inside animal. [1] 9.The force acting on you points ______________________ [1] 10.You acceleration points ______________________________[1] 11.Your velocity points ________________________________[1] outside inside Radius (r) : _________ Period (T): _________

4. El Toro (16pts) Your mass___________ First hill height: 54m Second hill height: 34m 1.You reach point a at 5.8m/s, what is your kinetic energy at point a ? [2] 2.What is your potential energy at point a ?[2] 3.What is your total mechanical energy at point a ? [1] 4.Assuming point is ground level, what is your speed at point b ? [2] 5.What is your potential energy at point c ? [2] 6.What is your kinetic energy at point c ? [1] 7.What is your speed at point c ? [2] 8.At which point (b or c) do you feel the heaviest? WHY? [2] 9.At which point (a or c) do you feel the lightest? WHY? [2] a b c