Chapter 9

NCERT
Class 9
Science
Solutions
20. Why does a block of plastic released under water come up to the surface of water ?

Question:

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

Answer:

Density of plastic piece is less than the density of water. Also, when the block is thrown under water the buoyant force is greater than it's weight. Therefore, when a plastic block is released under water, it comes up to the surface of water.

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