Answered: (a) Let forces F =-î+j, F, = j, F, =-2î… | bartleby

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(a) Let forces F =-i+j, F, = }, F, =-2î -4ĵ and F, = 21
are acting at 0(0,0), A(2,0),
B(0,-2) and C(3,2) respectively. Find (i) torque of all forces about O. (ii) sum of torques of
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all the forces about O. (iii) moment of all the forces about A, when no force is acting at A.
(b) Find the Lagrange's equation of motion for a pendulum bob suspended with a rubber band.
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