Why do objects float in liquids denser than themselves?

Why do objects float in liquids denser than themselves?


2 Answers

Mukesh Sharma
askIITians Faculty 43 Points
8 years ago
Weight of the body = W = downward force acting on the body
weight of liquid displaced by the body when completely inside the liquid = w = Buoyant force of
the liquid acting on the body upward
If (1) W > w , the body sinks
(2) W < w , the body floats
(3) W = w , the body remains in equilibrium inside the liquid.
When the density of the liquid is greater than that of the object, condition (2) is satisfied and hence
the body floats.
Thanks & Regards
Mukesh Sharma
askIITians Faculty
Sher Mohammad IIT Delhi
askIITians Faculty 174 Points
8 years ago
weight of the body=density of the body*volume*g
Buoyant force on body=density of the liquid*volume*g
volume is volume of body
=>buoyant force is more than weight
upward force is more, so object will float

Sher Mohammad, iit delhi
faculty, askiitian

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