Phys4AS17 AAChung

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 ....

Lab 19: Conservation of Energy and Angular Momentum  Amy, Chris, and John May 31,2017 In today's lab we were testing the conservation of energy and the angular momentum bu making a ruler collide with a piece of clay on the ground.  Theory: Due to the absence of external forces, angular momentum is conserved alike linear momentum. When we assume there are no external forces, these quantities would actually equal because the angular momentum before the collision is equal after the collision.  The inertia of our object, thought of as a system of objects where the total inertia is the sum of all individual inertias about the axis of rotation of a system. Which in our case is I=ML^2. For this inertia L is the distance away from the axis of rotation. For our lab, we tested to see if the angular momentum is conserved, before and after the collision. in order to find our angular velocity within our momentum formula, we assume there is a conservation of e...