Advertisements
Advertisements
Question
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
Solution
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
RELATED QUESTIONS
The unit of thrust is ..........
Pressure is the thrust acting on a surface of ........... area.
The unit of pressure is
Why do camels or elephants have broad feet?
A sharp pin works better than a blunt pin. Explain the reason.
It is easier to cut with a sharp knife than with a blunt one. Explain.
Find the thrust required to exert a pressure of 50000 pascals on an area of 0.05 m2 ?
The pressure in a liquid at two points in the same horizontal plane are equal. Consider an elevator accelerating upward and a car accelerating on a horizontal road. The above statement is correct in
Consider the statement given below and choose the correct option.
Assertion: Broad straps are used in bags.
Reason: Broad straps last for long.
The total force exerted by a body normal to the surface is called ______.
At higher altitudes, atmospheric pressure is ______.
Pressure can be increased by decreasing the force.
Determine the pressure when a force of 200 N acts on the area
- 20 m2
- 8 m2
Give reasons why:
a single nail pricking the body is painful when compared to lying on a bed of nails.
Give reasons why:
cutting edges of knives and axes are sharpened.
The net force in a particular direction is called ______.
All flowing substances, both liquids, and gases are called ______.
