Advertisements
Advertisements
प्रश्न
Why does a block of plastic released under water come up to the surface of water?
उत्तर
- Two forces act on an object immersed in water. One is the gravitational force, which pulls the object downward, and the other is the buoyant force, which pushes the object upwards.
- If the upward buoyant force is greater than the downward gravitational force, then the object will rise to the surface of the water as soon as it is released within it.
- For this reason, a block of plastic released under water rises to the surface.
APPEARS IN
संबंधित प्रश्न
What is the density of water in SI units ?
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.
An iron nail sinks in water but it floats in mercury. Why ?
Explain why, a piece of glass sinks in water but it floats in mercury.
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 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?
