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Force and pressure
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Define lateral pressure.
The pressure exerted by the fluids (liquids/gases) on the sides of containing vessel is called lateral pressure.
As we move on a higher altitude the pressure increases/decreases.
Decreases
Mercury is used as barometric liquid as it does not vaporise under vacuum conditions. (True/Flase)
True
Which instrument is used to measure atmospheric pressure?
Barometer
A force of 16 N acts on an area of 50 cm^2. What is the magnitude of pressure in pascal?
3200 Pa
Nose bleeding may occur at a high altitude because
The atmospheric pressure decreases
The pressure and thrust are related as
Pressure = Thrust/Area
The S.I. unit of force is kgf. (True/False)
False
Calculate the force if the area of cross-section is 20 cm^2 and the pressure exerted by the body is 12500 Pa.
25 N
Why can camels cross the desert and not horse or a donkey?
Because it has broad feet hence exerts less pressure
The unit of pressure is __________
Pascal
If a force of 20 N is applied and the distance between the hinge of the door and the point of application of force is 40 cm, then find the magnitude of moment of force.
8 Nm
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