Can you solve for tension using these formulas?

Thread starter electronicxco
Start date Feb 20, 2010
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Cylinder

AI Thread Summary

To calculate the tension in the string when the object is at the top of the circle, first determine the gravitational force using Fg = mg, which gives 28.5 N for the 2.91 kg object. Next, calculate the centripetal force required for circular motion using Fc = mv^2/r, resulting in 5.3 N. At the top of the circle, the tension in the string (T) can be found using the equation T + Fg = Fc, leading to T = Fc - Fg. Substituting the values, the tension is calculated to be -23.2 N, indicating that the gravitational force exceeds the centripetal force required. This analysis shows how to apply the relevant physics formulas to solve for tension in a circular motion scenario.

Feb 20, 2010

electronicxco

A 2.91 kg object is swung in a vertical circular
path on a string 3.94 m long.
The acceleration of gravity is 9.8 m/s2 .
If the speed at the top of the circle is 7 m/s,
what is the tension in the string when the
object is at the top of the circle?

can you show the formulas needed to get to the answer? Thanks a lot

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Feb 20, 2010

ideasrule

Homework Helper

Here they are:

F=ma
Fc=mv^2/r
Fg=mg

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