Why does a block of plastic released under water come up to the su | Filo
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Class 9

Science

Physics

Gravitation

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

Solution:

The density of plastic is less than that of water, so the force of buoyancy on plastic block will be greater than the weight of plastic block displaced. Hence, the acceleration of plastic block will be in upward direction, and comes up to the surface of water.

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