Hey i just had a question on a centripital force lab I did in school today. We had what was essentiall a hollow tube with a string through it, at one end was a hanging mass and on the other was a rubber stopper. The radius was kept constant by a clip marking the radius so it could not move higher or lower. The stopper was spun around with increacing masses hanging. We then had to calculate the V_T which i had no problem with. The Actual centripital force was the hanging mass converted into weight. When calculating the theoretical centripital force we used the formula(adsbygoogle = window.adsbygoogle || []).push({});

mv^2

r

Then to get percent error actual-theoretical/actual x 100.

My question is i have percent error for a few in the hundreds, is there a reason for this such as the radius kept changing, or counting the revolutions could have been wrong considering how fast it was.

P.S im sorry if i didnt make this clear if i didnt ill clear it up to the best of my ability.

Thanks for taking the time to look,

-Steve

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# Homework Help: Centripital Force Lab

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