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A body floats in a liquid contained in a beaker. If  the whole system falls under gravity, them the upthrust on the body due to liquids is

a)

equal to the weight of the body in air

b)

equal to the weight of the body in liquid

c)

zero

d)

equal to the weight of the immersed part of the body 


Question ID - 56824 | Toppr Answer

A body floats in a liquid contained in a beaker. If  the whole system falls under gravity, them the upthrust on the body due to liquids is

a)

equal to the weight of the body in air

b)

equal to the weight of the body in liquid

c)

zero

d)

equal to the weight of the immersed part of the body 

1 Answer - 5876 Votes

3537

Answer Key : (a) -

(a)

Upthrust is independent of all factors of the body such as its mass, size, density etc, except the volume of the body inside the fluid. Fraction of volume immersed in the liquid it depends upon the densities of the block and liquid. So, there will be no change in it if system moves upward or downward with constant velocity or some acceleration. Therefore, the upthrrust on the body due to liquid is equal tto the weight of the body in air.



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