Question

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

Answer 1

◆◆◆If you forcefully made block of plastic to sink then after removing force it will come upside because of Buoyant force.


Buoyant force is applied on every body which is in water.
➡️➡️It is an upward force.

Answer 2

a plastic piece placed in water come to the surface of water because the weight of water displaced by its immersed part is equal to its height.