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Question 30639
JEE Physics · Hard

Circular Motion: Loop-the-Loop MCQ

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Loop-the-LoopHardQuestion 30639

Question

A car (mass m) on the inside of a circular loop (radius R). At the top, normal force is N. Speed v satisfies:
  1. A
    mg + N = mv²/R
    Correct
  2. B
    mg − N = mv²/R
  3. C
    N − mg = mv²/R
  4. D
    N = mg

Correct answer

mg + N = mv²/R

Explanation

At the top of the loop (inside): both mg and N point toward the centre (downward). mg + N = mv²/R.

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