At one instant, force F = 4.0j N acts on a 0.25 kg object that has position

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At one instant, force F = 4.0j N acts on a 0.25 kg object that has position vector r = (2.0i - 2.0k) m and velocity vector r = (-5.0i + 5.0k) m/s. About the origin and in unit vector notation, what are?
(a) The object's angular momentum and
(b) The torque acting on the object?
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Fundamentals of Physics

ISBN: 978-0471758013

8th Extended edition

Authors: Jearl Walker, Halliday Resnick

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