Advertisements
Advertisements
Question
Name the force which makes heavy objects appear light when immersed in a liquid.
Advertisements
Solution
Buoyant force is the force that makes heavy objects appear light when immersed in a liquid.
APPEARS IN
RELATED QUESTIONS
What is the other name of buoyant force ?
What is meant by the term ‘buoyancy’ ?
The weight of a body floating in a liquid is ........
A simple U tube contains mercury to the same level in both of its arms. If water is poured to a height of 13.6 cm in one arm, how much will be the rise in mercury level in the other arm?
Given : density of mercury = 13.6 x 103 kg m-3 and density of water = 103 kg m-3.
Two cylindrical vessels fitted with pistons A and B of area of cross-section 8 cm2 and 320 cm2 respectively are joined at their bottom by a tube and they are completely filled with water. When a mass of 4 kg is placed on piston A, Find:
- the pressure on piston A,
- the pressure on piston B, and
- the thrust on piston B.
Why is a force needed to keep a block of wood inside water?
Two spheres A and B, each of volume 100 cm3 is placed on water (density = 1.0 g cm−3). The sphere A is made of wood of density 0.3 g cm−3 and sphere B is made of iron of density 8.9 g cm−3.
- Find:
- The weight of each sphere, and
- The upthrust on each sphere.
- Which sphere will float? Give reason.
What is the centre of buoyancy? State its position for a floating body with respect to the centre of gravity of the body.
Write the SI units of Buoyant force
A body will sink if the weight of the body is greater than the buoyant force.
