CBSE-XI-Physics
10: Rotational Mechanics
- #1Let
→Abe a unit vector along the axis of rotation of a purely rotating body and
→Bbe a unit vector along the velocity of a particle P of the body away from the axis. The value of
→A. →Bis
(a) 1
(b) -1
(c) 0
(d) None of these.digAnsr: cAns : (c) 0
For a purely rotating body, the axis of rotation is always perpendicular to the velocity of the particle.
Therefore, we have:
`` \stackrel{\to }{A}.\stackrel{\to }{B}=0``
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