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Preparing for Knotts

Preparing for Knotts. The park, not ‘how to tie..’ . First off. While at the park you must follow rules of conduct. If you break these rules knotts can kick you out of the park and even deny access to our school. Rules of conduct. Absolutely no profanity.

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Preparing for Knotts

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  1. Preparing for Knotts The park, not ‘how to tie..’

  2. First off • While at the park you must follow rules of conduct. If you break these rules knotts can kick you out of the park and even deny access to our school.

  3. Rules of conduct • Absolutely no profanity. • Line jumping, saving places will not be tolerated • Vandalism, graffiti and tagging prohibited • Appropriate clothing (shoes and shirts) required at all times. • No outside food allowed inside the park.

  4. Timing schedule • We should be on the bus by 7:45am and leaving by no later then 8am. • Sack lunches will be available from the school. • We should meet up around 12:30 to eat. • Check in with your chaperones regularly. • We have to be back by 5:30pm. That means by 4 pm do not get on anymore rides. We must be on the bus by 4:20 pm to get back in time.

  5. Some concepts to review. • Potential energy gravitational: • This is the energy stored in a system from gravitational pull. • PEg =mgh • g= 9.8 m/s2 • Use this when dealing with a height and you want to know how much energy is stored. • (we will cover finding the height of an object on Wednesday.)

  6. Some concepts to review. • Kinetic energy: • This is the energy stored in a system that is moving. • KE = ½mv2 • If an object is moving it has KE

  7. Finding v in KE • In case you forgot the velocity of an object is how far did it travel over how long did it take. • For this you will use a stopwatch (either one I give you or one on your phone) and you will figure out a distance it travels. Try to use a long flat section of the track that runs parallel to you.

  8. Now on to conservation of energy

  9. Conservation of energy • Conservation of mechanical energy • ME = ME • What ever you start with is what you end with. • Inside this equation is the expanded version Peg+KE = Peg+KE • If you work this out you will notice the masses cancel.

  10. Try out this example • You come up to a ride and notice that at the lowest point the track runs straight for about 20m. You measure that the cart takes 2.4 seconds to cover that distance. Find V

  11. Try out this example • Now that you have v, I want to you calculate the height of the first hill in the rollercoaster (remember the first one has to be the tallest) assume that the cart is at a stop at the top of the hill and that the part you timed was at height 0.

  12. Ok now try this out • You measure the height of a hill to be 73m. If the cart comes to a short stop at the top how fast will it be traveling at the bottom of the hill?

  13. Easy huh? • But that’s only conservation of energy. • You will have to calculate more then just that

  14. Angular values • Some rides spin, so we will need to find out their velocity and acceleration in angular physics.

  15. Rotational velocity • As you get further from the focal point, the faster you have to move to cover the same angle. • So the equation is vc= 2πr/T • Remember the period (T) is how long does it take to complete 1 cycle.

  16. Rotational acceleration • To find out how fast something is accelerating in a circle we must understand that when spinning an object will acceleration inwards. • The resulting equation is ac=v2/r

  17. ‘Gee’ forces • At any given time you are experiencing what is called a ‘g’ force. It is the acceleration due to gravity on your body. • 1 ‘g’ is 9.8m/s2. • On some of the rides you will need to calculate g force.

  18. g force • If you are on a ride and your measuring device shows 2 g’s acting on you. How fast are you accelerating?

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