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MHT CET202014 Oct 2020Evening ShiftPhysicsOscillationsActual

The length of the seconds pendulum is decreased by 0.3 ~cm when it is shifted from place A to place B. If the acceleration due to gravity at place A is 981 ~cm / s ² , the acceleration due to gravity at place B is ( . Take ²=10 )

Options

  1. A975 Cm / S ²
  2. B978 ~cm / s ²
  3. C984 ~cm / s ²
  4. D981 Cm / s ²

Correct answer

B. 978 ~cm / s ²

Step-by-step solution

For seconds pendulum T =26T=2 1 g 2=2 g of 1= l g gquaring: 1= ² g t= 9 ² = 981 10 =98.1 ~cm At place B, ^ =98.1-0.3=97.8 ~cm Again, 2=2 ^ g ^ 1= ² L g ^ g^ = ² ^ =10 97.8=978 ~cm / s ²

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