anonymous
  • anonymous
Consider the two statements : Statement A : Frictional Force can be zero even though the contact surface is rough. Statement B : Even though there is no relative motion between surfaces, friction force force may exists between them. Options a) Both A & B are true b) A is true B is false. c) A is false but B is true. d) Both A & B are false. Which and why is the right answer?
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Vincent-Lyon.Fr
  • Vincent-Lyon.Fr
Both are true.
anonymous
  • anonymous
Pl explain as my daughter has answered option c as correct and she needs to know why she is not correct?
Vincent-Lyon.Fr
  • Vincent-Lyon.Fr
If the contact surface is horizontal, and the object on it is at rest, without any sideways force pushing on it, then frictional force will be zero.

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Vincent-Lyon.Fr
  • Vincent-Lyon.Fr
The only contact force will be the normal force opposing weight of the object.

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