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Ram Sharma • 193.86K Points
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Q. The number of revolutions per km for a free rolling tyre are less than that calculated from its static radius. This difference in number of revolutions is due to

(A) hysteresis of the tyre materials which make the dynamic loaded radius somewhat larger than the static radius
(B) forces in the contact area that cause slight forward of the tread
(C) either of A and B
(D) None of the above
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