The moment of the couple formed by the forces and acting at the points and respectively

PHYSICS · Single correct · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion

Problem

The moment of the couple formed by the forces

5\hat{i} + \hat{k}

and

-5\hat{i} - \hat{k}

acting at the points

(9, -1, 2)

and

(3, -2, 1)

respectively, is (1)

-\hat{i} + \hat{j} + 5\hat{k}

(2)

\hat{i} - \hat{j} - 5\hat{k}

(3)

2\hat{i} - 2\hat{j} - 10\hat{k}

(4)

-2\hat{i} + 2\hat{j} + 10\hat{k}