Advertisements
Advertisements
Question
Define buoyant force. Name two factors on which buoyant force depends.
Advertisements
Solution
The upward force exerted by a liquid on a body when immersed in a liquid is known as buoyant force. The buoyant force depends on the following factors:
(i) Size or volume of the body immersed in a liquid.
(ii) The density of the liquid in which the body is immersed.
APPEARS IN
RELATED QUESTIONS
What causes buoyant force (or upthrust) on a boat ?
The S.I. unit of density is ..........
A body X sinks in water, but a body Y floats on water. The density of the body X is ......... than the density of body Y.
Pressure at the free surface of a water lake is P1, while at a point at depth h below its free surface is P2. (a) How are P1 and P2 related? (b)Which is more P1 or P2?
A dam has broader walls at the bottom than at the top. Explain.
Complete the following sentence :
Pressure at a point inside the liquid is ...................... To its depth.
The pressure of water on the ground floor is 40,000 Pa and on the first floor is 10,000 Pa. Find the height of the first floor. (Take : density of water = 1000 kg m-3, g = 10 m s-2)
Complete the following sentence :
A piece of wood is held under water. The upthrust on it will be ___________ the weight of the wood piece.
Calculate the hydrostatic pressure exerted by water at the bottom of a beaker. Take the depth of water as 40 cm, the density of water 1000 kgm−3 and g = 9.8 ms−2.
The blood pressure reading of a patient is recorded 160/100. Express the lower pressure in SI units.
[Take density of mercury as 13.6 × 103 kgm−3 and the value of ‘g’ as 10 ms−2]
