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# Sports Illustrated Log Ride

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## Ford Noble

on 11 May 2011

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#### Transcript of Sports Illustrated Log Ride

Sports Illustrated Log Ride Interesting Facts: This whole ride started with a couple of PVC pipes and a couple of saws. We cut every single pipe and glued them all together. After it was all stable and put together, we hooked up two water pumps to make a flow of water. As the water flows, and the boat goes around the ride, many physics concepts are emerged. Take a look at the ride and we will discuss these concepts in a second. Physics Concepts! Conservation of Energy As you can see in the demonstration of our ride, there is a change in height, speed, and of course friction is present.

Because of this, we can apply COE to the ride. We can make the initial energy equal to the final energy and then solve for the unknown. Kinematics Due to the motion in the ride, obviously, there is kinematics involved. We can see that there is displacement, and time (time to get from beginning to end).

We can then find initial, final, and average velocity. Having the velocities of the ride then allows us to solve for other equations as well such as acceleration. Momentum With the change in velocity (Vf-Vo), along with the mass, we can calculate the change in momentum.

This haves to do with Newton's second law, and our ride exhibits this well throughout the whole ride. Forces Forces are a very important part of our ride.

With a slant at the beginning therefore making components of gravity, along with friction, we are able to find out many important things about our ride.

Using the NET FORCE equations, we are able to find the force of friction, which if found using properties of the water and pipe and many other things, would require AP Phyics knowledge.

So by relating a concept that we have learned to our ride, we are able to tackle a difficult concept. TESTING RESULTS! Mechanics and Energy This comes into play with our water pump.
With a motor spinning a propellor pumping the water through the pump obviously something haves to run it.

Energy from a 120 DC volt powers a small motor which spins the propellor. That propellor pushes the water to the outside of the pump and then it goes through the tube powering our ride. After measuring the mass of the boat, height of the ride, displacement of the boat, and three trial times, we were able to solve many of our equations. We were able to find the: Velocity Average Velocity Final Acceleration Force of Friction We were able to confirm our calculations using our COE statement, which revealed only .0000003 Joules of energy were unnacounted for. Then lastly we found the change in momentum Our COE equation confirms to our group that both the project and the testing was a success.

To only unaccount for such a small amount of Energy was probably due to either rounding, or just a little bit more friction from the water. HOPE YOU ENJOYED OUR RIDE AND PRESENTATION! GO SPORTS ILLUSTRATED LOG RIDE! Couldn't put a real model... innapropriate.
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