1. Problem statement.(adsbygoogle = window.adsbygoogle || []).push({});

2. Relative formulas

http://en.m.wikipedia.org/wiki/Torsion_spring

3. Attempt.

Part a)

Since I am given the arc length S and radius, I use the equation s = r(theta) and I solve for theta, with r being the length of the rod and the addition of the radius of the ball.

Now I need to find torque, which is given since I know the radius and the force.

Now applying the equation t = k(theta) , I just solve for k.

Part b)

For this part I need to find the center of mass of the solid sphere (2/5mr^2) and I added distance from the axis of rotation by parallel axis theorem (ML^2)

Now I can find the period by using the equation 2(pi) * sqrt(I/k) since I have I and K.

Part c)

I'm thinking the work done by bending the spring would just be the equation 1/2k(theta^2)

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# Torsion spring problem

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