Advertisements
Advertisements
प्रश्न
A piece of wood if left under water comes to the surface. Explain the reason.
Advertisements
उत्तर
A piece of wood if left under water comes to the surface of water because the upthrust on body due to its submerged part is equal to its own weight.
APPEARS IN
संबंधित प्रश्न
What is the scientific name of the 'upward force' acting on an object immersed in a liquid?
What causes buoyant force (or upthrust) on a boat ?
Why do we feel light on our feet when standing in a swimming pool with water up to our armpits ?
Describe an experiment to determine the density of the material of a coin.
What is meant by pressure? State its S.I. unit.
State whether pressure is a scalar or vector?
Complete the following sentence :
Pressure of a liquid at a given depth is .................. To the density of the liquid.
Describe an experiment to show that a body immersed in a liquid appears lighter than it really is.
A small block of wood is completely immersed in (i) water, (ii) glycerine and then released. In each case, What do you observe? Explain the difference in your observation in the two cases.
The mass of a block made of certain material is 13.5 kg and its volume is 15 × 10-3 m3.
(a) Calculate upthrust on the block if it is held fully immersed in water.
(b) Will the block float or sink in water when released? Give a reason for your answer.
(c) What will be the upthrust on block while floating?
Take density of water = 1000 kg m-3.
