Lab 2: Airboat Model

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

The purpose of this lab was to test the relationship between velocity, position and time. As well as identify how accelerations affects an object's velocity and time. In this experiment, we will collect data on velocity, speed, and time. We used the equation Y=mx+b, in order to compare the velocity of each trial by comparing the slope and the y-intercept. If the slope was steeper on the graph, this meant that the cart had an increase in velocity. If the cart maintains at a constant speed, then the cart will have an increase in acceleration. In class we learned about the principles of acceleration, time, and velocity. Acceleration is an object’s increase in velocity. Velocity is how

If the resultant net force acting on the cart increases and total mass remains constant, than the acceleration will increase proportionally because Newton’s second law of motion states that acceleration is equal to the net force over the mass of the system; this demonstrates a directly proportional relationship between acceleration and net force because when acceleration increases, so does net force (Newton’s second law).

When the mousetrap car moves down the track, the speed of the mousetrap car decreases, therefore my hypothesis was supported. At 1 second, the mousetrap car was traveling at a speed of 3.2 m/s. At 2 seconds, the mousetrap car was traveling at a speed of 2.35 m/s. At 3 seconds, the mousetrap car was traveling at a speed of 1.53 m/s. At 4 seconds, the mousetrap car was moving at a speed of 1.2 m/s. At 5 seconds, the mousetrap car was traveling at a speed of .98m/s. “A car will eventually come to a stop if just allowed to roll as the friction between the road surface and the wheels causes friction that causes the vehicle to stop,”(Examples of Rolling Friction). The evidence supports the claim because the wheels of the mousetrap car are moving

The device that displayed the best motion had three wheels. The reason that the device with three wheels displayed the best motion might have been due to the fact that it was the most secure out of the two. The device was much more even than the device with four wheels, holding the front tire in place and making sure it did not add more mass to one side than the other. The device with four wheels had multiple instances where the front tires would lean more to one side than the other. The average distance the three-wheeled device traveled was 888 cm while the four-wheeled device traveled 486 cm, a 402 cm difference between the averages.

One type of physics the ride uses is ‘acceleration’ objects that are changing their speed or their direction accelerating. The rate at which the speed or direction changes is referred to as acceleration. Some amusement park rides (such as roller coasters) are organized by rapid changes in speed and or direction. These rides have large accelerations. Rides such as the carousel result in small accelerations; the speed and direction of the riders change over time.

We will look at the roller coaster. This is possibly one of the main attractions at an amusement park. What many people don't recognize is the fact that roller coasters aren't propelled by an engine. There is a good reason to back up the fact that the first hill is always the highest. Once the coaster is pulled up the hill by the crank, potential energy is at its fullest. As the coaster is making its way down the hill, that potential energy is converted into kinetic energy. At the bottom of the hill, kinetic energy is at its highest. Throughout the rest of the ride, the coaster is simply propelled by the constant conversion from potential to kinetic energy and back again. Another factor that enters into the extreme speeds that roller coaster

Before using the machine, dimensions must be taken of the cylinder, dimensions of the inlet and outlet, the distance from the cradle to the pivot point, the distance from the weight balancing collar to the pivot point, and the distance from the cylinder to the pivot point. Prior to engaging the machine’s fan, the apparatus must be balanced. Referring to Figure 1, move the weight balancing collar to balance the moments. At this time the mass of the weight added to the cradle and the drag force is zero. Once the apparatus is balanced, measure the distance from the weight balancing collar to the pivot point. The fan can now be turned on. Balance the apparatus now by adding weight to the cradle to counter balance the now existent drag force. Record the added weight. The drag force can be found by Equation 2 which is derived from Equation 1.

The fan pulls the string, letting the yellow ball loose and it accelerates downward to the left, at a constant speed on the cardboard glued to the wall until the ball hits the clothes pins attached to the other lower diagonal cardboard track which lowers the speed for a couple of seconds.

This investigation seeks to determine the distance that a marble can travel after leaving a ramp with retrospect to the ramps height. This experiment wished to find the relationship between the height of the ramp and the distance that the marble will travel from the end of the ramp (Diagram 1, value d). The ramp is positioned on top of a bench with the height of the ramp being the dependent variable.

To determine the speed and rate of acceleration of a toy truck rolling downhill on a ramp at varying angles.

For my speed test, I rolled a marble down a “ramp”. First, I measured 2.5 meters on a measuring tape, then, using a calculator, I split 2.5 meters into 5 equal distances (0.5 meters), which I marked using sticky notes so I would know where to press the “lap” button. Then, I noticed that the measuring tape was curved in, which could keep the marble on the “ramp”, so I had an idea that instead of rolling the marble on the floor, I could roll it on the measuring tape. I used tape to fix some of the lopsided parts on the measuring tape. Then, I started testing my marble’s speed. I rolled my marble down the track with a gentle push, and pressed “lap” at each lap marking (using the stopwatch on my computer). Then, after I got my split times for the

Fourtris efficiency percentage was 38.16% which isn’t terrible considering the conditions. Of course it will not expected to go above 50% because it was just a school project, but for a school project that’s pretty good. The definition for efficiency is, the efficiency is the energy output, divided by the energy input, and expressed as a percentage. It’s a percentage to show how well the Fourtris could move itself across the water. The efficiency is necessary to the Fourtris so there is a visual on how well it did. The fourtris would have a higher efficiency percentage if the creators checked for unbalanced parts of the boat such as, the fin placement and the balance of the battery pack.

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

-The Reynolds number of this experiment was then calculated using equation (4) where c is the length of the aerofoil chord and is the dynamic viscosity of air.