Question

The escape velocity for a planet is v, a tunnel is dug along a diameter of the planet and a small body



is dropped into it at the surface. When the body reaches the centre of the planet, its speed will bo

Answer 1

By energy conservation laws it would be equal to escape velocity v

Answer 2

Answer: It should be V/√2

Explanation: Concepts :

1) relation between work and gravitation potential

2) work energy theorem .