To study torque experimentally, you apply a force to a beam. One end of the beam is attached to a pivot that allows the beam to rotate freely. The pivot is taken as the origin or your coordinate system. You apply a force of F = Fx i + Fy j + Fz k at a point r = rx i + ry j + rz k on the beam. Part (a)  Enter a vector expression for the resulting torque, in terms of the unit vectors i, j, k and the components of F and r.  Part (b)  Calculate the magnitude of the torque, in newton meters, when the components of the position and force vectors have the values rx = 0.71 m, ry = 0.095 m, rz = 0.085 m, Fx = 4.2 N, Fy = -2.2 N, Fz = 8.4 N.   Part (c)  If the moment of inertia of the beam with respect to the pivot is I = 472 kg˙m2, calculate the magnitude of the angular acceleration of the beam about the pivot, in radians per second squared.

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter14: Static Equilibrium, Elasticity, And Fracture
Section: Chapter Questions
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To study torque experimentally, you apply a force to a beam. One end of the beam is attached to a pivot that allows the beam to rotate freely. The pivot is taken as the origin or your coordinate system. You apply a force of F = Fx i + Fy j + Fz k at a point r = rx i + ry j + rz k on the beam.

Part (a)  Enter a vector expression for the resulting torque, in terms of the unit vectors ijk and the components of F and r

Part (b)  Calculate the magnitude of the torque, in newton meters, when the components of the position and force vectors have the values rx = 0.71 m, ry = 0.095 m, rz = 0.085 m, Fx = 4.2 N, Fy = -2.2 N, Fz = 8.4 N. 

 Part (c)  If the moment of inertia of the beam with respect to the pivot is I = 472 kg˙m2, calculate the magnitude of the angular acceleration of the beam about the pivot, in radians per second squared. 

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