A frictionless tunnel is dug along a chord of the earth at a perpendicular distance 
from the centre of earth (where 
is radius of earth). An object is released from one end of the tunnel. The correct graph, showing the variation of acceleration of particle with its distance 
from centre of earth is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Let mass of the earth is M e and mass of object is m.
Force on object at 
towards centre.
Force on object along the tunnel
Acceleration of object along the tunnel
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