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प्रश्न
Explain the following statement:
Sleepers are laid below the rails.
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उत्तर
Wide wooden sleepers are placed below the railway tracks so that the pressure exerted by the rails on the ground becomes less.
संबंधित प्रश्न
Fill in the blank with suitable word :
It is the................. force which makes objects appear lighter in water.
Which of the following will sink or float on water? (Density of water = 1 g Cm-3)
body D having density 0.85 g m-3
Why does a piece of ice float on water?
Define the term thrust. State its S.I. unit.
A dam has broader walls at the bottom than at the top. Explain.
Complete the following sentence :
Pressure is .................... in all directions about a point in a liquid.
A vessel contains water up to a height of 1.5 m. Taking the density of water 103 kg m-3, acceleration due to gravity 9.8 m s-2 and area of base of vessel 100 cm2, calculate: (a) the pressure and (b) the thrust at the base of vessel.
A body will experience minimum upthrust when it is completely immersed in :
Select the correct option.
Unit of thrust in the SI system is
If the buoyant force is less, the object will float.
