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Unformatted text preview: Lab 10 Rotational Motion Objective: The objective of this lab is to investigate the relationship between torque, the moment of inertia and angular acceleration. Theory: Part 1) Again using Newtons 2 nd Law, F=ma, we can deduce F(perpendicular) to be mr(a). If this equation is then multiplied by r on both sides, we have rF(perpendicular)=mr^2(alpha) where rf(perpendicular) is the torque about the axis of the circle. Mr^2 is called the moment of inertia I of the mass about the axis of the circle and the question now simplified to be =I. To state in words, for a rigid body rotating about a fixed axis, the sum of the external torques computed about the axis is equal to the moment of inertia computed about the same axis times the angular acceleration. If the rigid body is described by a continuous mass distribution with a mass per unit volume of p(r), the moment of intertia I is given by (r)r 2 dv where dv is a differential volume element and r is the perpendicular distance from the axis to dv....
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