📊 Automobile Engineering
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) forces in the contact area that cause slight forward of the tread
  • (B) hysteresis of the tyre materials which make the dynamic loaded radius somewhat larger than the static radius
  • (C) either of (A) and (B) above
  • (D) none of the above
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✅ Correct Answer: (C) either of (A) and (B) above

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