What is gravity? Write down its SI unit. Write down any three effects of gravity.

The force of attraction of any heavenly bodies by which any bodies on its surface is attracted towards its center is called gravity. Its SI unit is Newton (N).

Any three effects of gravity are:

  1. Falling of objects towards the center of the earth.
  2. Flowing of rivers.
  3. Stability of large buildings and bridges.
  4. Existence of atmosphere on the surface of the earth.