Advertisements
Advertisements
प्रश्न
Why does an object float or sink when placed on the surface of water?
Advertisements
उत्तर
- When an object's density is less than 1 g cm-3 (water density), it floats on the water's surface because it always displaces more water than its weight.
- It floats because the buoyant force is greater than its weight. When an object has a density greater than 1 g cm-3, it sinks in water because it always displaces less water than it weighs.
- It sinks because buoyant force is smaller than its own weight.
APPEARS IN
संबंधित प्रश्न
The volume of a 500 g sealed packet is 350 cm3. Will the packet float or sink in water if the density of water is 1 g cm−3? What will be the mass of the water displaced by this packet?
Write the common unit of density.
What is the density of water in SI units ?
The relative density of mercury is 13.6. What does this statement mean?
Fill in the blank with suitable word :
A heavy ship floats in water because its....................density is less than that of water.
An iron nail sinks in water but it floats in mercury. Why ?
Name the force the upward push of water on a submerged object .
A beaker full of water is suspended from a spring balance. Will the reading of the balance change if a piece of heavy metal is placed in it ?
Give reasons for your answer.
A boy get into a floating boat .
What happens to the boat ?
Consider the following information in respect of four objects A, B, C and D :
| Object | Density(kg/m3) | Volume(m3) | Mass(kg) |
| A | 2 | 4000 | |
| B | 8000 | 4 | |
| C | 2000 | 1000 | |
| D | 4 | 2000 |
Which object would float on water ?
