Prediction For this experiment, you\'ll whirl a rubber stopper around in a circl
ID: 1950053 • Letter: P
Question
Prediction For this experiment, you'll whirl a rubber stopper around in a circle of radius r at one end of a string, while a mass hangs at rest from the other end of the string. Consider two trials in the experiment in which the same mass M hangs from the string, but the stopper follows circles of different radii. Will the stopper have a greater speed with the radius is larger, or when the radius is smaller? Explain your thinking. Now consider two trials with different masses hanging from the lower end of the string, but in which the stopper travels a circle with (roughly) the same radius r. Will the stopper have a greater speed with the hanging mass is larger, or when the hanging mass is smaller? Why?Explanation / Answer
-The force needed to keep the block in circular orbit F = mv2/R
therefore, when the radius is smaller, the speed will be smaller (for the same force F = Mg)
-when the mass is larger, the F pulling on the stopper will be larger, and the speed will be greater