Lab report 9

# Lab report 9 - Purpose The purpose of this activity was to...

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Purpose: The purpose of this activity was to explore the transformation of energy that occurs during the movement of a simple pendulum, as well as to examine the conservation of mechanical energy. We will also measure the rotational inertia of a disk and ring as each object is under a constant angular acceleration. Theory: A. When a simple pendulum swings, the kinetic energy is transformed into potential energy as the speed and height of the pendulum vary. When the pendulum moves with speed v, and has an angle (theta), the kinetic energy (k), and the potential energy (U) can be found using- K=1/2mv^2 and U=mgh=mg(L-Lcos(theta)) B. The rotational inertia of an object depends on the mass and the distribution of the mass. The more compact the less the rotational inertia will be. This is given by- I=1/2M(R1^2+R2^2). Procedure: A. With the pendulum in the equilibrium position and at rest, click the ‘start’ button. Lift the pendulum approximately 20° and let it go.

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## This note was uploaded on 05/02/2011 for the course PHYS 213 taught by Professor H during the Spring '10 term at Wichita State.

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Lab report 9 - Purpose The purpose of this activity was to...

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