1. TERRIBLE TWISTER Presentation by: Elliptical Foci

2. Objectives To determine the specific forces exerted on the body while riding the Terrible Twister To prove that the ride is in fact safe for people of all shapes and sizes To understand the physics involved with the ride TWISTER ^v=at

3. Ride Overview The Terrible Twister is basically a huge barrel that spins at such a speed that it allows you to stick to the inside of the walls Once up to a given speed the bottom of the barrel drops out from under your feet for about 30 seconds Then as the ride slows you begin to slide to the bottom and come to a stop

4. Method of Research Three Axis Force Probe Measuring Tape Video Camera Three axis probe Measuring tape Video camera

5. Force of gravity in Z direction (run #1) Acceleration in the tangential in Y direction (run #1) Acceleration in the X direction (run #1)

6. Force of gravity in Z direction (run #2) Acceleration in the tangential in Y direction (run #2) Acceleration in the X direction (run #2)

7. Force of gravity in Z direction (run #2) Force of gravity in Z direction (run #1) Acceleration in the tangential in Y direction (run #2) Acceleration in the tangential in Y direction (run #1) Acceleration in the X direction (run #1) Acceleration in the X direction (run #2)

8. The Good Stuff As the ride progresses there are many different forces introduced. As the ride progresses there are many different forces introduced. In the “X” direction In the “X” direction Velocity Centripetal force

9. The Good Stuff As the ride progresses there are many different forces introduced. As the ride progresses there are many different forces introduced. In the “Y” direction In the “Y” direction Velocity Min and Max Acceleration Tangential forces Friction

10. The Good Stuff As the ride progresses there are many different forces introduced. As the ride progresses there are many different forces introduced. In the “Z” direction In the “Z” direction Velocity Acceleration Gravity Friction

11. Modifications to Make Take the video camera and 3-axis at the same time Take the video camera and 3-axis at the same time Not get sick… Not get sick… Take measurements from a force plate as well, to verify data Take measurements from a force plate as well, to verify data Make sure and know how to work the equipment with ease Make sure and know how to work the equipment with ease

12. Conclusion The “terrible twister” was a good experimental ride The “terrible twister” was a good experimental ride We learned that this ride is safe for people of all shapes and sizes…even Prof. Winslow We learned that this ride is safe for people of all shapes and sizes…even Prof. Winslow We all learned a great deal and most importantly, had fun We all learned a great deal and most importantly, had fun