Why does a block of plastic released under water come up to the surface of water?

Answer

When an plastic is immersed in water, there are two forces acting upon it

  • Gravitational force in downward direction
  • Buoyant force in upward direction

 

In this case,

the buoyant force on plastic is more than the gravitational force.

Thus, plastic will come up to the surface of water.

  1. Class 9
  2. Chapter 10 Class 9 - Gravitation

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.