Force F = -4.4 Ni+ 6.4 N j acts on a small rock with a position vector r = 3.1 m i+ 8.5 m j relative to the origin. In unit vector notation, what is the resulting torque on the rock about the point (2.4,4.7,9.9)m?

Force F = -4.4 Ni+ 6.4 N j acts on a small rock with a position vector r = 3.1 m i+ 8.5 m j relative to the origin. In unit vector notation, what is the resulting torque on the rock about the point (2.4,4.7,9.9)m?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter3: Vectors

Section: Chapter Questions

Problem 11PQ

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Scalars and Vectors

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Question

Force F = -4.4 Ni+6.4 N j acts on a small rock with
a position vector r = 3.1 m i+ 8.5 m j relative to the
origin. In unit vector notation, what is the resulting
torque on the rock about the point (2.4,4.7,9.9)m?
a. -17.6 j Nm
O b. 40.8 j Nm
O c. 57.2 (-k) Nm
d. 57.2 k Nm

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