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JEE Main201912 Apr 2019Evening ShiftPhysicsLaws of MotionActual

A spring whose unstrentches length is l has a force constant k . The spring is cut into two pieces of unstretches lengths l 1 and l 2 where, l 1 = n l 2 and n is an integer. The ratio k 1 / k 2 of the corresponding force constants, k 1 and k 2 will be:

Options

  1. A1 n 2
  2. Bn 2
  3. Cn
  4. D1 n

Correct answer

D. 1 n

Step-by-step solution

Spring constants of the spring will be inversely proportional to length. k 1 k 2 = l 2 l 1 = 1 n

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