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What is torque? Explain the torque acting on a particle. |
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Answer» Solution :Internal force of mutual interactions among the particles of a system are equal in MAGNITUDE and opposite in direction. Therefore the resultant TORQUE due to them is zero. So we shall ignore the internal forces. Suppose `VEC(F_(1)),vec(F_(2)),vec(F_(3))....vec(F_(n))` are the external forces acting on the particles having position vectors `vec(r_(1)),vec(r_(2)),vec(r_(3))....vec(r_(n))`. The resultant torque acting on the system is the VECTOR sum of torque acting on the particles. `therefore` Resultant torue `vectau=vec(r_(1))xxvec(F_(1))+vec(r_(2))xxvec(F_(2))+......+vec(r_(n))xxvec(F_(n))` `therefore vectau=vectau_(1)+vectau_(2)+............+vectau_(n)` |
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