3) What is torque 't' in a circular motion?
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A particle is located at position r relative to its axis of rotation. When a force F is applied to the particle, only the perpendicular component F⊥ produces a torque. This torque τ = r × F has magnitude τ = |r| |F⊥| = |r| |F| sin θ and is directed outward from the page.
Other units: pound-force-feet, lbf⋅inch, ozf⋅in
In SI base units: kg⋅m2⋅s−2
SI unit: N⋅m
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