Q.
A body floats in a liquid contained in a beaker. The whole system as shown falls freely under gravity. The upthrust on the body due to the liquid is
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a
Zero
b
Equal to the weight of the liquid displaced
c
Equal to the weight of the body in air
d
Equal to the weight of the immersed position of the body
answer is A.
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Detailed Solution
Upthrust =Vρliquid(g−a) where, a = downward acceleration, V = volume of liquid displaced But for free fall a = g ∴ Upthrust = 0
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