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


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

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 9 years and a teacher from the past 16 years. He teaches Spoken English, Written English, Grammar and Vocabulary at Englishtan.