A pendulum is suspended in a lift and its period of oscillation when the lift is stationary is  $T_0$. What must be the acceleration of the lift for the period of oscillation of the  pendulum to be $T_0/2$ ?
  • A$2g$ downward
  • B$2g$ upward
  • C$3g$ downward
  • D$3g$ upward
Medium
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