If the speed of a rod moving at a relativistic speed parallel to its length is doubled,

(d)1/2 mw2l. Explanation:  Since the rod rotates on the horizontal surface, the horizontal component of the force applied by the clamp is the centripetal force = mω²r = mω²(l/2) = ½mω²l.

(a) smallest at the top and gradually increases down the rod Explanation:  For a hanged heavy uniform rod, at any cross-section, the load is only of the part of the rod which...

(b) a moving-coil galvanometer

(b) A relativistic speed v is proportional to 1 - v2/c2.

(c) Both A and B are true

(b) The rod and the experimenter move with the same speed v in opposite directions.

(b) become more than double

(b) may be equal to L' (c) may be more than L' but less than L

(a) must incrase by a factor of γ

(2) Let the initial length and breadth be l and b, respectively. So, the initial perimeter = 2 (l + b) The final perimeter = 2 (2l + 2b) =...