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प्रश्न
Explain the following statement:
It is easier to cut with a sharp knife than with a blunt one.
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उत्तर
It is easier to cut with a sharp knife because even a small thrust causes great pressure at the edges and cutting can be done with less effort.
संबंधित प्रश्न
What is the law of floatation?
Write an expression for the pressure at a point inside a liquid. Explain the meaning of the symbols used.
How does the liquid pressure on a diver change if :
The diver moves horizontally?
Complete the following sentence :
Pressure at a point inside the liquid is ...................... To its depth.
What is the cause of upthrust? At which point can it be considered to act?
A body weighs 450 gf in air and 310 gf when completely immersed in water. Find
(i) The volume of the body,
(ii) The loss in weight of the body, and
(iii) The upthrust on the body.
State the assumption made in part (i).
A body of mass 3.5 kg displaces 1000 cm3 of water when fully immersed inside it. Calculate:
- the volume of body,
- the upthrust on body and
- the apparent weight of body in water.
Is thrust a scalar or vector quantity?
The center of gravity of the floating body and the center of buoyance are in the same ______ line.
Salt water provides less buoyant force than freshwater.
