A.What is the magnitude of the torque about the origin on a sand grain at coordi

Question

A.What is the magnitude of the torque about the origin on a sand grain at coordinates (3.0, -2.0, 4.0) m due to a force F1 = 8.0 N i - 4.0 N j + 3.0 N k?

B.What angle (in radians) does this torque make with the y-axis?

C.What is the magnitude of the torque about the origin due to a force F2 = 8.0 N i + 4.0 N j - 3.0 N k?

D.What is the magnitude of the torque about a point (-3.0, -2.0, 4.00) m due to the net force of F1 and F2?

I know I just need to use the cross product but I'm having trouble understanding how to do it in an x,y,z plane.

Explanation / Answer

A) r * F1=

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