 # LAB 10.docx - Usama Zia Lab 9a1: Moment of Inertia and...

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Usama ZiaLab 9a1: Moment of Inertia and Energy in Rotational MotionPHYS 111A-010Date of Experiment: 6/17/21Date of Report: 6/20/21Instructor: Ion CohanoschiIntroduction:Objectives:1.To explore the rotational motion of rigid bodies with respect to angular position andangular velocity at a constant angular acceleration;2.To evaluate the relation of those angular quantities to the linear position and linearvelocity in a system with a bound motion including translational and rotational motion;3.To experimentally determine the moment of inertia of an object and compare to thecalculated one; and4.To demonstrate the conservation of energy in a system involving a rotational motion.Theoretical Background:The angular displacement, from time to timeThe average angular velocityThe instantaneous angular velocityThe average angular accelerationThe instantaneous angular acceleration isThe rotational inertia of solid disk rotating access through its center of massThe rotational inertia of a ring rotating through its center of massTotal rotational kinetic energy
Traveling distance of hanging mass represents its relative heightProcedure:Main goal of this lab is to experimentally determine the moment of inertia of an object with helpof the law of conservation of energy and compare it to theoretically calculated one.Part I: Measure the physical quantities of objects used in this experiment.The following measurements are basically necessary in order to calculate the theoretical momentof inertia ofeach object and to relate the linear velocity of the hanging mass to the angular velocity of therotating body.1. Measure the masses of a disk, a ring, a square mass, a mass hanger, and a given weight (seeFigure 7).2. Measure the radius of the disk and the inner and outer radii of the ring (refer to Figure 4).3. Measure the radius of the rim of the 2nd pulley from the top of the step‐pulley where the stringis wound (refer to Figure 3).Part II. Theoretical determination of the moment of inertia of an object1. Calculate the rotational inertia when each of two point masses (the 300 g‐square mass) ispositioned equally apart from the rotational axis by d distance. The d value will be given by yourinstructor.2. Calculate the rotational inertial of the disk when it rotates around its center of mass (refer toFigure 5(A)).3. Calculate the rotational inertial of the disk when it rotates at axis of rotation off its center ofmass by ddistance (refer to Figure 5 (B)). The d value will be given by your instructor. .

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Term
Spring
Professor
Universal
Tags
Rigid Body, Rotation
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