# Lab 127_ Torque and rotational inertia.pdf - Giovanni...

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Giovanni Visbal PHYS: 111A Aneer Lamichhane December 1 2020 Lab 127: Torque and rotational inertia Objectives 1. To experimentally determine the rotational inertia of a rotating body by measuring its angular acceleration and applying the relation a ; r = I 2. To practice computation of rotational inertias for objects with different shapes (different mass distributions) Introduction When a force is exerted on a rigid object pivoted about an axis, the object tends to rotate about that axis. The tendency of a force to rotate an object about some axis is measured by a quantity called torque t. The magnitude of a single torque associated with the force F is defined by… Fr r = a r = I I = r i m i i 2 The rotational inertial of rotating body (experimentally) I total = r α T r = r g a T ( g ) F net = ∑ F = m T = m = m a Experimental Procedures Is given in the Lab manual and PowerPoint given Materials
Results: Table 1: Object Mass [Kg] Radius [m] Rotational Inertia [Kg*m 2 ] Disk M = 1.4297 R = 0.23 Through the center of mass I = MR 2
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