Advertisements
Advertisements
प्रश्न
Pressure is a scalar quantity because ______.
- it is the ratio of force to area and both force and area are vectors.
- it is the ratio of the magnitude of the force to area.
- it is the ratio of the component of the force normal to the area.
- it does not depend on the size of the area chosen.
Advertisements
उत्तर
b and c
Explanation:
Pressure is defined as the ratio of the magnitude of component of the force normal to the area and the area under consideration.
i.e, P = F/A
Pressure is a scalar quantity. Pressure acts normal on a surface and it is always compressive in nature, therefore, only its magnitude is required for its complete description.
APPEARS IN
संबंधित प्रश्न
Explain why The blood pressure in humans is greater at the feet than at the brain
The S.I. unit of pressure is pascal.
Pressure is the thrust acting on a surface of ........... area.
The unit of thrust is
State the unit of thrust
Why do camels or elephants have broad feet?
A gum bottle rests on its base. If it is placed upside down, how does the pressure change?
Find the thrust required to exert a pressure of 50000 pascals on an area of 0.05 m2 ?
Calculate the pressure exerted on a surface of 0.5 m2 by a thrust of 100 kgf.
Consider the statement given below and choose the correct option.
Assertion: Broad straps are used in bags.
Reason: Broad straps last for long.
A brick is kept in three different ways on a table as shown in the following figure. The pressure exerted by the brick on the table will be
 |
 |
 |
| A | B | C |
A chapatti maker is a machine which converts balls of dough into chapatties. What effect of force comes into play in this process?
If the same force is made to act on a larger area, the pressure ______.
At higher altitudes, atmospheric pressure is ______.
Pressure is directly proportional to the area of contact.
What is an Artisan aquifer?
Fluids in general are ______.
Hot air is ______ dense than ordinary air.
What is the SI unit of pressure?
Assertion (A): A sleeping mattress is so designed that when you lie on it, a large area of your body comes in its contact.
Reason (R): This reduces the pressure on the body and sleeping becomes comfortable.
