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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
The weight of a body floating in a liquid is ........
If a fresh egg is put into a beaker filled with water, it sinks. On dissolving a lot of salt in the water, the egg begins to rise and then floats. Why ?
Which of the following will sink or float on water? (Density of water = 1 g Cm-3) body B having density 2520 kg m-3
The diagram given below show a body floating in three different liquids. A, B and C at different levels.
(a) In which liquid does the body experience the greatest buoyant force?
(b) Which liquid has the least density?
(c) Which liquid has the highest density?
Differentiate between thrust and pressure.
How does the pressure exerted by thrust depend on the area of surface on which it acts? Explain with a suitable example.
What do you understand by the term upthrust of a fluid? Describe an experiment to show its existence.
Calculate the hydrostatic pressure exerted by water at the bottom of a beaker. Take the depth of water as 40 cm, the density of water 1000 kgm−3 and g = 9.8 ms−2.
How is thrust different from pressure?
The magnitude of buoyant force acting on an object immersed in a liquid depends on ______ of the liquid.
