A tunnel is dug along a chord of the earth at a perpendicular distance R/2 from the earth’s centre. @PhysicsMasterAcademy

Uploaded March 2026 | Updated September 2026, 3 weeks ago

Question no.12- A tunnel is dug along a chord of the earth at a perpendicular distance R/2 from the earth’s centre. The wall of the tunnel may be assumed to be frictionless. Find the force exerted by the wall on a particle of mass m when it is at a distance x from the centre of the tunnel.
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