Advertisements
Advertisements
प्रश्न
What is the law of floatation?
Advertisements
उत्तर
A body will float in a liquid if the weight of the body is equal to the weight of the liquid displaced by it.
Key Points:
-
Buoyant Force:
- When a body is partially or fully submerged in a liquid, it experiences an upward force called the buoyant force.
-
Condition for Floating:
- For a body to float, the buoyant force must equal the weight of the body.
- This happens when the density of the body is less than or equal to the density of the liquid.
-
Stable Floating:
- In equilibrium, the body displaces an amount of liquid whose weight is exactly equal to its own weight.
APPEARS IN
संबंधित प्रश्न
Name the force which makes heavy objects appear light when immersed in a liquid.
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
(a) body A having density of 500 kg m-3
The density of water is 1.0 g Cm-3. The density of iron is 7.8 × 10″3 g Cm-3. The density of mercury is 13.6 g Cm-3.
Ans the following:
Will a piece of iron float or sink in water?
How does the pressure exerted by thrust depend on the area of surface on which it acts? Explain with a suitable example.
Complete the following sentence :
Pressure is .................... in all directions about a point in a liquid.
What is the centre of buoyancy? State its position for a floating body with respect to the centre of gravity of the body.
A body is held inside water contained in a vessel by tying it with a thread to the base of the vessel. Name the three forces that keep the body in equilibrium, and state the direction in which each force acts.
Pressure in a water pipe on the ground floor of a building is 100,000 Pa. Calculate the pressure in the water pipe on the first floor at a height of 3 m. [Density of water = 1000 kgm−3 ; g = 10 ms−2]
What is meant by up thrust?
The center of gravity of the floating body and the center of buoyance are in the same ______ line.
