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प्रश्न
The S.I. unit of upthrust is :
विकल्प
Pa
N
kg
kg m2
उत्तर
The S.I. unit of upthrust is : N
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संबंधित प्रश्न
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
body D having density 0.85 g m-3
Complete the following sentence :
Pressure at all points at the same depth is ....................
Complete the following sentence :
Pressure at a point inside the liquid is ...................... To its depth.
(i) The diameter of neck and bottom of a bottle are 2 cm and 10 cm, respectively. The bottle is completely filled with oil. If the cork in the neck is pressed in with a force of 1.2 kgf, what force is exerted on the bottom of the bottle?
(ii) Name the law/principle you have used to find the force in part (a).
Define upthrust and state its S.I. unit.
It is easier to lift a heavy stone under water than in air. Explain.
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.
A block of wood is floating on water with its dimensions 50 cm x 50 cm x 50 cm inside water. Calculate the buoyant force acting on the block. Take g = 9.8 N kg-1.
What do you mean by buoyancy?
How is thrust different from pressure?
