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.

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo