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7.Gravitation
hard
In both figures shown below a hole along the diameter of earth. In first, a particle is released from $A$ and it oscillated with time period $T_1$. In second figure, same particle is released from point $B$ and it oscillates with time period $T_2$ then [$O$ is centre of earth]
A
$T_1 > T_2$
B
$T_1 < T_2$
C
$T_1 = 2T_2$
D
$T_1 = T_2$
Solution
Time period of oscillation is independent of the distance of the point from the centre of
earth. In both cases $ \mathrm{T}=2 \pi \sqrt{\frac{\mathrm{R}_{\mathrm{e}}}{\mathrm{g}}}$
Standard 11
Physics
