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JEE Main 202125 FebruaryMorning Shift
Exam
JEE Main
Year
2021
Date
25 February
Shift
Morning Shift
Subject
Physics
Chapter
Oscillations

JEE Main 2021 · 25 February · Morning Shift · Physics · Oscillations

If the time period of a two meter long simple pendulum is 2s , the...

If the time period of a two meter long simple pendulum is 2s2s, the acceleration due to gravity at the place where pendulum is executing S.H.M. is:

Options

  1. A2π2ms−22{\pi}^{2}m{s}^{- 2}
  2. B16ms−216m{s}^{- 2}
  3. Cπ2ms−2{\pi}^{2}m{s}^{- 2}
  4. D9.8ms−29 . 8m{s}^{- 2}

Correct answer

A. 2π2ms−22{\pi}^{2}m{s}^{- 2}

Step-by-step solution

T=2πlgT = 2\pi\sqrt{\dfrac{l}{g}}

2=2π2g2 = 2\pi\sqrt{\dfrac{2}{g}}

⇒g=2π2⇒ g = 2{\pi}^{2}

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