Pre-Assessment: Energy: Questions And Answers

This quiz is to be completed individually. You may refer to course materials in order to prepare your answers. However, do not discuss the questions and answers with any other person regardless of whether they are in the class or not.

People love to go to amusements parks to have fun with their friends & family. In an amusement park, the most thrilling, fast , fun ride are the roller coasters. Have you ever asked yourself how does a roller coaster really works? Do you think that roller coasters would run safely without the knowledge of physics? Physics is what it’s makes it work effectively and safely. Force and newton’s laws and energy transformations, such as potential and kinetic energy are in a roller coaster. In the next few paragraphs, i will get into more details about how a roller coaster really works.

Hypothesis: I think speed will increase while the time increases. The car will accelerate while it goes down the ramp therefore not making it a constant speed or straight line.

ground, so it accelerates. If the track tilts up, gravity applies a downward force on the back of the

4. Place the mass on the bottom of a ramp and attach the loop of string to the

attached to the body of the wagon. With the wheel fixed the journey was slower but safer. Uphill a

Ellen’s train should travel faster than 198.88mph but slower than 200.11mph and in 2.5 hours Ellen’s train would have traveled more than 497.2mi but less than 500.28mi.

Using Vernier, we clicked collect while releasing the cart after motion detector starts to click. This was done moving the hand quickly out the path. Using logger pro, indicated which portion was to be used by dragging across the graph to indicate the starting and ending times. Then the linear button was clicked to perform the linear regression of the selected data. The Linear Button was used to determine the slope of the velocity vs. time graph, only using the portion of the data for times when the cart was freely rolling. We found the acceleration of the cart from the fitted line. Record the value in the data table. These steps where repeated 5 mores times. Measured the length of the incline, x which is the distance between the two points of the ramp. Measure the height, h, the height of the book(s). The last two measurements was used determine the angle of the incline. Raise the incline by placing a second book under the end. Adjust the book so that distance, x, is the same as the previous reading. Repeated these steps with 3, 4 and 5 books.

To test Newton’s seconds law if whether changing the mass or the force affects the acceleration of an object or a trolley in this case to increase or decrease.

The car, being above the ground, has gravitational potential energy. Which, when placed on the ramp, transforms into kinetic energy. This kinetic energy pushes the car down the ramp, towards the ground and the momentum carries the car forward. The wheels allow it to gain more distance, as using wheels is the most effective way of transporting something. Having only 3 groups of wheels reduces friction compared to having 4 groups of wheels.

At first, you expect to be pulled forward by a chain lift. However, the train starts to be pulled backwards up the lift that flanks the loading station and releases you from it’s magnetic grip once you reach the summit. As you plummet down the 150 foot drop, you fly through the station at a speed of 50 miles per hour. “The Green Spider” immediately banks left and through the first loop of “The Brown Serpent” and begins to corkscrew. As the corkscrew finishes, you fly into the first loop on your ride. While going through the loop, you see “The Brown Serpent” pass below you. Immediately after the loop, you begin another corkscrew and bank left. There is a moment for you to recover before you are thrown into another loop and a corkscrew. You slow down and attach to another lift that pulls you back up to the 150 foot drop. This time when the bracket release you, you will be going through the whole ride. This time, it will be backward.

Figure 2: Sketch of Setup As shown in figure 2, the setup consisted of stacking the ramp on top of textbooks, the motion sensor at the top, and the cart about 15 cm away from it. The next step was to measure the acceleration of the cart without any weights. After three trials, the data recorded by the motion sensor was averaged. The slope of the line indicated the velocity. The previous steps were repeated, with a 100g weight increasing after every three trials.

The Triumph then falls back slightly behind each vehicle ... until it again lunges FORWARD to the next car.

As the ride begins, you will immediately start up a 90 meter (295 foot) hill. Considering the roller coaster is in a building, the 90-meter tall hill comes out of the top of the building. Suddenly, as riders plunge down the hill, they will enter back into the dark building. As the riders are going up the hill, Newton’s Second Law will be at work on them. The train will be going at a constant speed up the lift hill. When the riders reach the peak of the hill, they will have the highest potential energy in the whole ride. Nevertheless, the roller coaster cart will only sit at the top of the hill for a split second, then riders will feel the weightlessness as they zoom back down the hill. While the cart rolls down the hill, it will accelerate, leaving riders with the feeling of air resistance on their skin. As a result, this is where the ride will reach its

A rightward moving rider gradually becomes an upward moving rider, then a leftward moving rider, then a downward moving rider, before finally becoming a rightward-moving rider once again. There is a continuing change in the direction of the rider as he/she will moves through the clothoid loop. A change in direction is one thing of an accelerating object. The rider also changes speed. As the rider begins to climb upward the loop, he/she begins to slow down. What we talked about suggests that an increase in height results in a decrease in kinetic energy and speed and a decrease in height results in an increase in kinetic energy and speed. So the rider experiences the greatest speeds at the bottom of the loop. The change in speed as the rider moves through the loop is the second part of acceleration which the riders experiences. A rider who moves through a circular loop with a constant speed, the acceleration is centripetal and towards the center of the circle. In this case of a rider moving through a noncircular loop at non-constant speed, the acceleration of the rider has two components. There is a component which is directed towards the center of the circle (ac) and relates itself to the direction change and the other component is directed tangent (at) to the track and relates itself to the car's change in speed. This tangential component would be