Verified Solution • 2025–26 Session moderate

QJEEM22Phccc7: JEE Main 2022 Physics - Class 11 JEEM22Phccc7 Solution: Time period of a simple pendulum in a stationary lift is 'T'.…

Time period of a simple pendulum in a stationary lift is 'T'. If the lift accelerates with g6 vertically upwards then the time period will be :

(Where g = acceleration due to gravity)

Multiple Choice Options

  • A 65T
  • B 56T
  • C 67T
  • D 76T

Step-by-Step Verified Solution

T′=2πIgeff T^{\prime}=2 \pi \sqrt{\frac{I}{g_{\text {eff }}}}

T′=2πIg+g6=2π6l7gT^{\prime}=2 \pi \sqrt{\frac{I}{g+\frac{g}{6}}}=2 \pi \sqrt{\frac{6 l}{7 g}}

⇒T′=67T\Rightarrow T^{\prime}=\sqrt{\frac{6}{7}} T

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