After conducting our experiment, we concluded that the hypothesis was correct. A change in the mass of a moving object does affect the speed of the object. We arrived at this conclusion by rolling five marbles with different masses down a small scale roller coaster and recording how long it took each marble to roll from the starting point to the ending point of the roller coaster. The data from our investigation is the amount of time it took each marble to go down our roller coaster in seconds. Each marble has five sets of data because we conducted five trials. In trial one, marble one took 1.919 seconds, marble two took 1.992 seconds, marble three took 1.799 seconds, marble four took 1.676 seconds, and marble five took 1.696 seconds. In trial two, marble one took 2.496 seconds, marble two took 1.776 seconds, marble three took 1.836 seconds, marble four took 1.843 seconds, and marble five took 1.856 seconds. In trial three, marble one took 2.102 seconds, marble two took 1.628 seconds, marble three took 1.547 seconds, marble four took 1.665 seconds, and marble five took 1.775 seconds. In trial four, marble one took 2.844 seconds, marble two took 1.852 …show more content…
The force of gravity pulls the roller coaster car down the track and momentum allows the car to go up a hill without stopping. We also learned about speed, acceleration, and velocity in the category of motion. We learned that the speed of the car depends on its mass, that the car would accelerate going downhill due to gravity, and that the velocity of the car would change when going through a turn. Lastly, we learned how a roller coaster works. We know that there needs to be some sort of high drop in your roller coaster to gain momentum and keep the roller coaster car going. We also know that the velocity must be greater than the rolling friction to keep your wheels