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Laws of Motion
Question
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How is centripetal force provided in case of the following? 

  1. Motion of planet around the sun, 
  2. Motion of moon around the earth. 
  3. Motion of an electron around the nucleus in an atom

Answer

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

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Some More Questions From Laws of Motion Chapter

Is Aristotle’s law of motion now correct?

State Galileo’s law of motion.

Define inertia.

When the branches of an apple tree are shaken, the apples fall down. Why?

A person jumping out from a moving car or bus falls forward. Why?

Due to what type of inertia, the spark leaves the grind stone tangentially while sharpening the knife?

Which law of motion is also called law of inertia?

What is measure of inertia of body?

Which law of motion defines the force?

What happens to a stone tied to the end of string and whirled in a circle if the string suddenly breaks?