1. The tangential force is opposite in direction to the external force, and therefore partially cancels it. 2. Forces involved are normally particle gravity and inter-particle contact forces including normal and tangential force . 3. This means that the axial and tangential forces that act on the blade vary with rotor speed. 4. The reason for this is that the normal force is the sum of the tangential force and centripetal force. 5. Current flowing radially outward along one side of the arrowhead and radially inward on the other produces the tangential force . 6. A tangential force of 100 pounds ( 400 N ) is sufficient to start the antenna rotating on the turntable. 7. Furthermore, the normal and axial forces will have no effect, so tangential force must be provided by friction. 8. C _ n and C _ t are the coefficient of normal force and the coefficient of tangential force respectively. 9. In this case, if the tangential force is reduced then the elastic deformations and shear stresses reduce as well. 10. We really want to know the tangential force pulling the blade around, and the radial force acting against the bearings.
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