20
Question Question 20
Why a block of plastic when released under water come up to the surface of water?
When plastic is immersed in water, two forces act on it:
- Gravitational force or its weight in vertically downward direction
- Buoyant force in vertically upward direction.
As the density of plastic is less than that of water, the buoyant force is greater than its weight. Hence, the plastic comes up to the surface.