Advertisements
Advertisements
Question
Why does an object float or sink when placed on the surface of water?
Advertisements
Solution
- 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
RELATED QUESTIONS
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?
What is the value of relative density of water ?
Why does ice float in water ?
The density of a body is 800 kg/m3. Will it sink or float when dipped in a bucket of water ? (Density of water = 1000 kg/m3).
Fill in the blank with suitable word :
A heavy ship floats in water because its....................density is less than that of water.
Explain why, a piece of glass sinks in water but it floats in mercury.
Why does a ship made of iron and steel float in water whereas a small piece of iron sinks in it ?
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 ?
A rectangle wooden block has length, breadth and height of 50 cm, 25 cm and 10 cm, respectively. This wooden block is kept on ground in three different ways, turn by turn. Which of the following is the correct statement about the pressure exerted by this block on the ground?
