Advertisements
Advertisements
प्रश्न
Why do we feel light on our feet when standing in a swimming pool with water up to our armpits ?
उत्तर
We feel light on our feet when standing in a swimming pool with water up to our armpits because of the buoyant force. It exerts an upward force on our body and makes us feel our apparent weight which is less than our actual weight.
APPEARS IN
संबंधित प्रश्न
A boy get into a floating boat.
What happens to the buoyant force on the boat ?
Define the term Density of a substance.
Why do sea divers need special protective suit?
A vessel contains water up to a height of 1.5 m. Taking the density of water 103 kg m-3, acceleration due to gravity 9.8 m s-2 and area of base of vessel 100 cm2, calculate: (a) the pressure and (b) the thrust at the base of vessel.
What is meant by the term buoyancy?
A piece of wood if left under water comes to the surface. Explain the reason.
A body of mass 3.5 kg displaces 1000 cm3 of water when fully immersed inside it. Calculate:
- the volume of body,
- the upthrust on body and
- the apparent weight of body in water.
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]
How is thrust different from pressure?
In a fluid, buoyant force exists because the pressure at the ______ of an object is greater than the pressure at the top.
