Analysis
Our goal was to find the deceleration of a pellet when shot through a water balloon. To do this we needed one picture with four images of the pellet. Two images of the pellet had to be before the balloon and two had to be after the balloon. Due to time restrictions, we were unable to get enough the pictures that we had in mind. Delays for pictures that were taken were off, so none of the pictures have the four images. We were able to take pictures with the two images before the balloon and one image with the images after the balloon. We used these two photos to get some calculations from the little data we were able to acquire.
Before we shot the balloon we took a picture of a ruler to use as a scale for analyzing the data. We then measured the distances traveled by the pellet before it came in contact with the balloon in one photo and the distance it traveled after it left the balloon in another photo. We were told the initial velocity of the pellet and the time interval was calculated between the first pair of pellets in the photo. We calculated the velocity of the set pair of pellets by using the formula Velocity = Distance/time. To find the difference in speed caused by the water balloon we used Final Velocity - Initial Velocity.
Picture of Scale used for analysis
Two photos used for analysis
In order to analyze the photos we found the velocity of the pellet before the balloon by using the formula v=d/t. d=.1748 m and t=.000956s Vi=183 m/s. Then after the balloon using the same formula v=d/t. d=.1503 m and t= .000956 s and Vf=157 m/s. The change in velocity is Vf-Vi which equals 157 m/s - 183 m/s=-26 m/s. The water balloon decreased the velocity of the pellet by 26 m/s.