A mass moves in a circle of radius at a constant speed of . What is the centripetal force (in N)?

Answer and explanation

Correct answer: B. 8

  1. Step 1: Note the given parameters: particle mass , radius of circular path , and orbital speed .
  2. Step 2: Apply the centripetal force equation: .
  3. Step 3: Substitute the values: .
Answer
8.
Why not the others: The alternative options (16, 2, 9) omit the factor of in kinetic energy or confuse momentum with kinetic energy.

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