Hi. Consider an object attached to the end of the string that is whirled vertically in a circle of radius r. When it is @ degrees from the horizontal, it has the speed v and the tension in the string is T. What is the mass of the object?(adsbygoogle = window.adsbygoogle || []).push({});

The picture shows that the object is in the first quadrant travelling clockwise.

What I've done so far is:

T + cos @ mg = m v^2 / r

After plugging in the values given, I've failed to come up with the correct answer. What am I doing wrong? Thank you.

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# Homework Help: Vertical pendulum, mass of object

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