Background & Lab Introduction
Acceleration is the increase/decrease in the rate of speed. For this lab, we were asked to prove that acceleration due to gravity (9.8m/s^2) is the same if an object is dropped or if the object has x-velocity.Â
For this lab, we performed 10 trials of 2 different methods (dropping vs. rolling (x-velocity)). This makes a total of 20 trials (10 per methods). For the dropping method, we dropped a ball 29.5 inches (0.749 m) 10 times and used a stopwatch to record the time it took to hit the ground. For the rolling method, we rolled a ball off of a table from the same distance (29.5 inches/0.749m). We recorded the time with a stopwatch. We also recorded each trial to double check the accuracy of the time.
Calculated Acceleration:
9.13 m/s^2
Calculated Acceleration:
9.02 m/s^2
Compare and Contrast: Both of these methods are valid and effective. Both methods show that gravity remains (almost) the same, even with an x-velocity. Although they are different, they are similar methods that show a similar result. Both accelerations are within 10% of 9.8 m/s^2.
Possible Errors: Calculation errors, stopwatch errors, and dropping/rolling errors
The results of this experiment support the fact that gravity is always 9.8 m/s^2. The accelerations were calculated by taking the change in velocity and dividing it by the change in time. These calculations were entered into excel. The equations used were velocity = d/t and acceleration = delta v/t. Overall, this experiment was successful and educational. We were able to visually and mathematically support gravity's acceleration remaining the same.