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Pl help it’s for a grade

Pl help it’s for a grade-example-1
User Iizno
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Answer:

  • C. It acts only on objects that are at rest
  1. If an object is at rest then it is in static equilibrium which means the sum of the forces =0.
  2. Friction is applied to moving rigid bodies
  3. I do exams and quizzes if your interested!!!
User Gord Stephen
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