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Suppose a tunnel is dug along a diameter of the earth. A particle is dropped from a point, a distance h directly above the tunnel, the motion of the particle is
simple harmonic
parabolic
oscillatory
non-periodic
When a particle is dropped from a height h above the centre of tunnel.
(i) It will oscillate, through the earth to a height h on both sides
(ii) The motion of particle is periodic
(iii) The motion of particle will not be SHM
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