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प्रश्न
A body will sink if the weight of the body is greater than the buoyant force.
पर्याय
True
False
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उत्तर
A body will sink if the weight of the body is greater than the buoyant force- True.
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संबंधित प्रश्न
Define buoyant force. Name two factors on which buoyant force depends.
What is the law of floatation?
How is the unit bar related to the S.I. unit pascal?
Write an expression for the pressure at a point inside a liquid. Explain the meaning of the symbols used.
A hammer exerts a force of 1.5 N on each of the two nails A and B. The area of cross section of tip of nail A is 2 mm2 while that of nail B is 6 mm2. Calculate pressure on each nail in pascal.
- Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g cm-3.
- Will the height of the water column in part (a) change if the cross-section of the water column is made wider?
Will a body weigh more in air or vacuum when weighed with a spring balance? Give a reason for your answer.
Prove that the loss in weight of a body when immersed wholly or partially in a liquid is equal to the buoyant force (or upthrust) and this loss is because of the difference in pressure exerted by liquid on the upper and lower surfaces of the submerged part of body.
A beaker contains a liquid of density ‘ρ’ up to height ‘h’ such that ‘PA’ is atmospheric pressure and ‘g’ is the acceleration due to gravity. Answer the following questions:
- What is the pressure on the free surface of the liquid?
- What is the pressure on the base of the beaker?
- What is the lateral pressure at the base on the inner walls of the beaker?
Salt water provides less buoyant force than freshwater.
