Question

What provides the necessary centripetal force in the following cases?
(i) electron moving around the nucleus. (ii) moon moving around the earth. (iii) whirling of
stone tied to a string.​

Answer 1

Answer:

i Gravitational force acting on the planet and the sun provides the necessary centripetal force. ii Force of gravity due to earth on the moon provides centripetal force. iii Electrostatic force attraction between the electron and the proton provides the necessary centripetal force.