The binding energy of a particle of mass m with a planet, when it is on the planet's surface, is 1/2mv02. A tunnel is dug along the diameter of the planet and the particle is dropped into it from the surface, when the body reaches the center of the planet, its speed is:
Correct answer: B. v0/√ 2
- A. v0
- B. v0/√ 2
- C. Zero
- D. V0/2
Explanation
This is the following solution: The motion of the particle within the tunnel is simple harmonic. At the mean position, all of its energy is K.E. which is equal to half of binding energy.
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Newton’s law of universal gravitation relates the force between masses to their masses and separation, while gravitational field strength explains weight and orbital motion. The topic covers satellite velocity and period, escape ideas, weightlessness in free fall, and artificial gravity, which differs from ordinary gravitational attraction.
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