Julie+and+Caroline

=Great Adventure=

Activity A: First Drop
(**Green Lantern)**

http://i51.tinypic.com/2958nm1.jpg
 * Top view**

http://brightcove01.brightcove.com/2/268012956001/268012956001_897778121001_vs-897766400001.jpg?pubId=268012956001
 * Side view**



mass of car: 70 kg


 * Free Body Diagrams**
 * 5) Evaluate: **

a. Safety: What features were in place? There are safety belts to go over your shoulders for when you flip in the ride. There's also a bike seat type thing for safety because this is a standing roller coaster.

b. Describe the weight sensations on the way up, on the way down, and at the bottom of the first hill: did you feel lighter, heavier, or normal? On the way up we felt heavier, on the way down you feel lighter because of the lessened normal force, and at the bottom of the hill you feel heavy because the direction of the car changes but your body is slightly delayed so you feel heavier momentarily.

c. Describe the excitement level: on the way up, on the way down, and at the bottom of the first hill: Going up the hill was not very exciting because the roller coaster traveled at a constant speed, while going down the hill was very exciting because the farther down the hill you traveled the more the coaster was accelerating.

d. Describe the thrill factors that contribute to those feelings (besides the #g’s). On the way up, the only exciting part was the anticipation of going down which was increased by the clicking noise made by the track. Going down was exciting because of the g forces and because of all the wind blowing in your face which made it seem even faster. It was also very exciting on this coaster because you stand for the whole ride which is a very unique sensation.

Calculations: Final Velocity Acceleration Power Theoretical Final Velocity Theoretical Acceleration Theoretical Power

Percent Differeces: Velocity Acceleration Power

Evaluate Safety
 * Number of g's of the hill down
 * Were the number of g's safe?
 * Yes .841 g's is smaller then the maximum acceleration that humans can withstand.
 * Is there a correlation between number of g's and excitement level?
 * Yes, because as the acceleration increases the thrill increases.

Thinking About Physics
 * Explain the behavior of the mass on the string. did the FBD of the car correlate to the mass on the string? Why or why not?
 * The string for going up and going down was opposite of that of the FBD of going up and down. At the bottom was the same for both.
 * Did the number of g's correlate to the sensation of weight?
 * Yes, because as the number of weight increases, so does the sensation of weight, the more g's you have, the heavier you feel.
 * Discuss the graphs you created and why they curve the way they do?
 * Distance vs. Time
 * At first, the car travels steadily upwards, so it moves the same distance over the same amount of time so the slope remains the same. Then when the car goes down the hill, it begins to cover more distance in less time (it accelerates), so the slope changes.
 * Velocity vs. Time
 * The velocity remains constant on the way up the hill, but as it begin to desend, the velocity increases because the roller coaster begins to accelerate.
 * Acceleration vs. Time
 * At first there is no acceleration, but when the roller coaster descends the initial hill it begins its acceleration.
 * Thrill vs. Acceleration
 * As acceleration increases, thrill increases

None of our percent errors went above 20% which is the general goal regarding percent error. From our percent errors we know that our calculations and data were fairly accurate and precise. As per usual, there was plenty of room for human error. Timing especially was difficult for this ride because it was very fast down the incline and hard to time.
 * Percent Error Analysis**

Activity B (Batman)
http://www.tellinitlikeitis.net/wp-content/uploads/batman-roller-coaster.JPG Free Body Diagrams Graphs 5) Evaluate:

a. Safety: What features were in place? There were safety straps, that safely secured the passenger into the ride and an evacuation platform for the ride if needed.

b. Describe the weight sensations on the way up, on the way down, and at the bottom of the first hill: did you feel lighter, heavier, or normal? On the way up we felt lighter, while on the way down you feel heavier.

c. Describe the excitement level: on the way up, on the way down, and at the bottom of the first hill: It was very exciting throughout the whole loop.

d. Describe the thrill factors that contribute to those feelings (besides the #g’s). This was very exciting and thrilling because being upside down is not a common experience unless one is a gymnast. That was definitely the most thrilling part of the ride, the constant flips and the feelings of having no normal force holding you in the seat other than from the safety shoulder straps was very exciting.

Think About Physics
 * Explain the behavior of the mass on the string. Did the FBD of the car correlate to that of the mass? Why or why not?
 * The mass on the string correlated with the free body diagram.
 * Did the #g's correlate to the sensation of weight?
 * Yes, because as the number of g's increased, the sensation of weight went up as well.
 * Discuss the graphs that you created and why they look the way they do.
 * Centripetal Force vs Time
 * The centripetal force increased as you get to the top.
 * Velocity vs Time
 * Velocity decreases as the coaster approached the top of the loop, and increases after you pass through the top and make your way down to the bottom of the loop.
 * Acceleration vs Time
 * The acceleration is negative when the coaster is nearing the top of the loop, 0 at the top of the loop, and positive as it is nearing the bottom of the loop.

[[image:Screen_shot_2012-05-28_at_3.38.29_PM.png]]
mass of car: 80 kg

Free Body Diagrams
Top and Side View Graphs Calculations Average Speed

Centripetal Acceleration Apparent Weight Theoretical Average Speed Theoretical Centripetal Acceleration

Percent Differences Average Speed Acceleration Apparent Weight

Evaluate Safety
 * Was the number of g's within safe limits?
 * [[image:Screen_shot_2012-05-28_at_8.14.06_PM.png]]
 * Yes because the number of g's is below 4.
 * Was there a correlation between # of g's and excitement level? Explain, providing evidence.
 * As the number of g's increase, the excitement level increases.

Evaluate
 * Describe the safety of this ride.
 * The carousel was not much of a thriller and therefore does not require much in the way of safety, however, it does have certain requirements. There were seatbelts to prevent falling from the carousel animal seats. Parents or guardians were also instructed to hold smaller children so that they did not fall and injure themselves.
 * Describe the excitement level that you felt at the min and max height (if vertical), or at max speed (if horizontal).
 * The thrill increased and the speed built up. Then the thrill stayed the same as soon as we reached max speed.
 * Describe the thrill factors that may contribute to those feelings (besides the #g’s)
 * The constant spinning and centripetal force could contribute to the thrill feelings.
 * Describe the weight sensations at the top, side, and bottom of the loop. Did you feel lighter, heavier, or normal?
 * Weight seemed to stay the same throughout.

Thinking about the Physics Both percent errors for this ride were below 15%, which is good. This means that our data and calculations were relatively precise. As always theres room for human error with regards to timing and recording data which can contribute to percent error.
 * Explain the behavior of the mass on the string. Did the FBD of the car correlate to that of the mass? Why or why not?
 * The FBD of the mass on the string and that of the carousel are basically the same except for the centripetal force acting upon the carousel horse.
 * Discuss the graphs that you created and why they look the way they do.
 * Centripetal Force vs Time
 * The centripetal force increases as the carousel continues to spin.
 * Acceleration vs Time
 * The velocity increased when the ride started, remained constant as the ride during the middle portion and decreased when the ride came to a stop.
 * Thrill vs Acceleration
 * As acceleration increases, thrill increases.
 * Percent Error Analysis:**