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To get any object to move in a circle you have to apply a force to it
Member rating: No Rating | Words: | Submitted: Wed Oct 18 2006
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To get any object to move in a circle you have to apply a force to it. With your experiment you don't mention anything about controlling or measuring the force. All you have measured is the (average) period of the object moving in a circle. From this you can calculate the average speed and acceleration. To turn this into an investigation you would need to measure the force pulling the bung into the circular path. i.e. the tension in the string. At the moment, if you put more effort in the bung will go faster, even if you don't change the radius of the circle, or the mass of the bung. One way to do this would be to include a spring of suitable strength into the string and you could possible measure the extension of the spring as you twirl it around to estimate the force. Another method I've...
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