I swung a bucket filled with water in circles and calculated the minimum centripetal force that the bucket had to have in order for the water not to spill.
I found out that I had to swing the bucket with a maximum of 1.8 seconds but the water started spilling when I was swinging at 1.4 seconds per loop. These calculations are derived from putting a stopwatch on a camera recording.
My calculations are correct but now I ask...What could be causing this difference? I'm thinking gravitational constant is different in Iceland than simply 9,8 but what other factors could be contributing to the problem other than a difference in swing speed (human error)?