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Force F= (2.84 i - 1.39 k)N acts on a pebble with position vector r= (6.54...

Force F= (2.84 i - 1.39 k)N acts on a pebble with position vector r= (6.54 j - 1.60 k)m , relative to the origin. What is the resulting torque acting on the pebble about (a) the origin and (b) a point with coordinates (4.96 m, 0, -1.43 m)?

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Answer #1

a) The position vector about the origin is

The force is

The torque about the origin is

b) The position vector about  (4.96 m, 0, -1.43 m) is

The torque is

This gives

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