Advertisements
Advertisements
Question
The mass of a block made of certain material is 13.5 kg and its volume is 15 × 10-3 m3.
(a) Calculate upthrust on the block if it is held fully immersed in water.
(b) Will the block float or sink in water when released? Give a reason for your answer.
(c) What will be the upthrust on block while floating?
Take density of water = 1000 kg m-3.
Solution
Mass of a block = 13.5 kg
Weight of the block = 13.5 kgf
Volume = 15 × 10-3 m-3
Density of water = 1000 kgm-3
(a) Upthrust = Volume of block × density of water × g
= 15 × 10-3 × 1000 × g
= 15 kgf
(b) The block will float since the upthrust on it is more than its weight (= 13.5 kgf) when fully immersed in water.
(c) While floating , upthrust = 13.5 kgf (weight of the body)
APPEARS IN
RELATED QUESTIONS
What is meant by the term ‘buoyancy’ ?
Define buoyant force. Name two factors on which buoyant force depends.
Describe an experiment to determine the density of the material of a coin.
How is the unit bar related to the S.I. unit pascal?
The S.I. unit of pressure is :
The pressure P1 at a certain depth in river water and P2 at the same depth in sea water are related as :
Define upthrust and state its S.I. unit.
A body will experience minimum upthrust when it is completely immersed in :
You are provided with a hollow iron ball A of volume 15 cm3 and mass 12 g and a solid iron ball B of mass 12 g. Both are placed on the surface of water contained in a large tub.
- Find upthrust on each ball.
- Which ball will sink? Give a reason for your answer (Density of iron = 8.0 g cm-3)
What do you understand by the term “Buoyancy”.
