# A tunnel is dug along the diameter of the earth. There is a particle of mass m at the centre of the tunnel. Find the minimum velocity given to the particle so that is just reaches to the surface of the earth (R=radius of the earth)

### Asked by akkamal03 | 26th May, 2020, 12:11: PM

Expert Answer:

### Here we are required to find, minimum velocity given to the particle so that is just reaches to the surface of the earth
Hence, by applying law of conservation of energy,
Initial Total energy of particle = Final energy of particle
Initially the energy of the particle at the centre of the Earth is given as,

### Answered by Shiwani Sawant | 26th May, 2020, 07:05: PM

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