Consider the vectors a = 6i +2j+9k and b = 7i - 6j - 6k, where i, j, and k are mutually- perpendicular unit vectors forming a right-handed system. (a) Calculate (i) a + b. (ii) The magnitude la of a. (iii) The unit vector 6 in the direction of b. (iv) The scalar product a. b. (v) The vector product a x b. (vi) The direction cosines of a. (vii) The angle between a and b, expressed in degrees to two decimal places.

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Rotational Equilibrium And Rotational Dynamics

In physics, the state of balance between the forces and the dynamics of motion is called the equilibrium state. The balance between various forces acting on a system in a rotational motion is called rotational equilibrium or rotational dynamics. 

Equilibrium of Forces

The tension created on one body during push or pull is known as force.