Question

list two forces which act as on a body when it is immersed in a liquid . state the condition or a body to float or sink in a liquid . why does an iron nail sink and a place of wood floats when placed on the surface of water?

Answer 1

(i) Weight of the body acting downwards. (ii) Buoyant force acting upwards.

to float-     weight=Buoyant force

for sink-      weight   >    buoyant