Lab 21: June 5, 2017: Physical Pendulum Lab

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Lab 21: Physical Pendulum Lab
Amy, Chris, and John 
June 5, 2017

In today's lab we derived an expression for the period for various physical pendulums. 

Theory: When an object oscillates, the period is dependent on the moment of inertia and the center of mass. We will prove with different objects that each period will come with a resultant differently. I will present first a theoretical approach for each object and later show the results of our experimental.
The objects we will be using in this lab will be a semicircle and an isosceles triangle. 

Apparatus and Procedure: For the semicircle, we chose two points of the circle  for the object to oscillate. The hemisphere of the circle and the top curvature of the circle. On the hemisphere, we know the moment of the inertia of the disk is still half times the mass and radius. To find the top curvature part of the circle of the moment of inertia, we applied the parallel axis theorem. 


Later we derived the expression for an isosceles triangle rotating about the top of the triangle. 



Data:



Conclusion: Our experiment and theoretical results came close to what we predicted. Our margin error was on average 5% but it's really close. Applying the tape and paperclip for the object to oscillate was maybe was caused the error in our calculations or our measurements as well.

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