Advertisements
Advertisements
Question
Why does an object float or sink when placed on the surface of water?
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
Write the common unit of density.
Why does ice float in water ?
Fill in the blank with suitable word :
A heavy ship floats in water because its....................density is less than that of water.
Explain why, big boulders can be moved easily by flood.
Steel sinks in water but a steel boat floats. Why ?
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 cork is placed in water ?
A boy get into a floating boat .
What happens to the boat ?
A `1/2` kg sheet of tin sinks in water but if the same sheet is converted into a box or boat, it floats. Why?
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?
