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