The bob of a simple pendulum executes simple harmonic motion in water with a period t, while the period of oscillation of the bob is t_o in air. Neglecting
frictional force of water and given that the density of the bob is (4 / 3) x 1000 kg / m³. What relationship
between t and t_o is true ?

• A

  $\mathrm{t}={\mathrm{t}}_0$

• B

  $\mathrm{t}={\mathrm{t}}_0/2$

• C

  $t=2t_0$

• D

  $\mathrm{t}=4{\mathrm{t}}_0$