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प्रश्न
For a floating body, its weight W and upthrust FB on it are related as :
पर्याय
W > FB
W < FB
W = FB
Nothing can be said
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उत्तर
For a floating body, its weight W and upthrust FB on it are related as : W= FB
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संबंधित प्रश्न
A body is held immersed in a liquid. (i) Name the two forces acting on the body and draw a diagram to show these forces. (ii) State how the magnitudes of two forces mentioned in part (i) determine whether the body will float or sink in liquid when it is released. (iii) What is the net force on the body if it (a) sinks and (b) floats?
A block of wood is so loaded that it just floats in water at room temperature. What change will occur in the state of floatation, if
(a) Some salt is added to water, (b) Water is heated?
Give reasons.
A body of weight W is floating in a liquid. Its apparent weight will be
A weather forecasting plastic balloon of volume 15 m3 contains hydrogen of density 0.09 kg m-3. The volume of equipment carried by the balloon is negligible compared to its own volume. The mass of an empty balloon alone is 7.15 kg. The balloon is floating in air of density of 1.3 kg m-3. Calculate:
(i) The mass of hydrogen in the balloon,
(ii) The mass of hydrogen and balloon,
(iii) The total mass of hydrogen, balloon and equipment if the mass of equipment is x kg,
(iv) The mass of air displaced by balloon and
(v) The mass of equipment using the law of floatation.
State the principle of floatation. What can you say about the average density of a ship floating on water?
Explain the following:
A hydrometer is made heavy near the bottom.
Why does a helium balloon float in air?
Why do petroleum-based products float on the surface of the water?
Name different types of Hydrometers with their applications.
Assertion (A): Lactometer is used to check the purity of milk.
Reason (R): Lactometer measures the cream content of milk.
