A particle starts from rest at a large distance from a planet, reaches the planet only under gravitational attraction, and passes through a smooth tunnel through its centre. The correct statement about the particle will be:
 
1. the total energy of the particle will be zero at a large distance.
2. the gravitational potential energy of the particle at the centre will be \(3/2\) times that of at the surface of the planet.
3. the gravitational potential energy of the particle at the centre of the plant will be zero.
4. both (1) and (2).
Subtopic:  Gravitational Potential |
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Which of the following shows the graphically correct variation of gravitational potential with distance \(r\) from the centre of the uniform thin spherical shell? (\(R=\)radius of shell)
1. 2.
3. 4.
Subtopic:  Gravitational Potential |
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