29. A body needs a force F, just to start motion on a surface, a force F, to continue its motion and a force F, to roll on the surface. What is (i) the static friction (ii) sliding friction and (iii) rolling friction ? State whether F, is equal, less than or greater than (i) F, and (ii) F3.
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Explanation:
1. F1 = Static friction
2. F2 = Sliding friction
3. F3= Rolling friction
F 1>F2>F3
F2 is less than F1 but greater than F3.
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