1.

Assertion (A): The torque about the point 3vec(i)-vec(j) + 3vec(k) of a force represented by 4vec(i) + 2vec(j) + vec(k) through the point 5vec(i) + 2vec(j) + 4vec(k) is vec(i) + 2vec(j)-8vec(k) Reason (R ): The torque of a force F about a point P is vec(r ) xx vec(F ) where vec(r ) is the vector from the point P to any point vec(a) on the line of action of vec(F ) Which of the following is correct ?

Answer»

Both (A) and (R ) are TRUE and (R ) is the CORRECT EXPLANATION of (A)
Both (A) and (R ) are true and (R ) is not the correct explanation of (A )
(A) is true, (R ) is FALSE
(A) is false, (R ) is true

Answer :A


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