Advertisements
Advertisements
Question
A body of mass 50 g is floting in water. What is the apparent weight of body in water? Explain your answer.
Solution
Mass of body = 50 g
Apparent weight of body = Weight of body in air – Weight of water displaced by body.
But when a body floats, then the weight of body in air is equal to the weight of water displaced by the body.
=> Apparent weight of the body = 0
APPEARS IN
RELATED QUESTIONS
A body dipped into a liquid experiences an upthrust. State two factors on which upthrust on the body depends.
Write the density of water at 4°C in S.I. unit .
A body weighs W gf in air and W1 gf when it is completely immersed in water. Find: (i) Volume of the body, (ii) Upthrust on the body and (iii) Relative density of the material of the body.
A loaded cargo ship sails from sea water to river water. State and Explain your observations.
Explain the following :
An egg sinks in fresh water, but floats in a strong salt solution.
A wooden block floats in water with two-third of its volume submerged.
(a) Calculate the density of wood.
(b) When the same block is placed in oil, three-quarters of its volume is immersed in oil. Calculate the density of oil.
The density of ice is 0.92 g cm-3 and that of sea water is 1.025 g cm-3. Find the total volume of an iceberg which floats with its volume 800 cm3 above water.
A hollow cylinder of copper of length 25 cm and area of cross-section 15 cm2, floats in water with 3/5 of its length inside water. Calculate:
(1) apparent density of a hollow copper cylinder.
(2) wt. of cylinder.
(3) extra force required to completely submerge it in water.
Complete the following result:
The density of water is ______ Kgm-3.
