Bernoulli’s theorem is important in the field of:
Bernoulli’s theorem is important in the field of the flow of liquids. Bernoulli’s principle can be summarized as ‘total pressure is constant... View Article
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In case of streamlined flow of liquid, the loss of energy is
In case of streamlined flow of liquid, the loss of energy is minimum because different layers glide over one another... View Article
A body is said to be perfectly elastic if
A body is said to be perfectly elastic if it recovers its original shape/size when the deforming force is removed.... View Article
What does Tangential Force Produce?
Tangential force Tangential force is defined as the force acting on a moving body in the direction of the tangent... View Article
For elastomers, stress and strain variation is _________ within elastic limit.
It is not a straight line. Elastomers do not obey Hooke’s law.
The stress which is set up in the body due to increase in its dimensions is called
The stress which is set up in the body due to increase in its dimensions is called tensile stress.
In Hooke’s law, the constant of proportionality signifies
Hooke’s law states, that stress is proportional to strain Stress α strain Stress = modulus of elasticity x strain
Putty or mud is an example of
Since mud or putty has no gross tendency to regain their previous shape & they get permanently deformed, they are... View Article
After prolonged use, springs deform permanently because of
Because of elastic fatigue, the material of spring loses its elasticity and deforms permanently.
A hawk of mass 10 kg dives to catch a mouse. During dive it loses 500 J of its potential energy. The height from where it begins its dive is (take g = 10 m/s2)
Change in Gravitational Potential Energy = mass x acceleration x change in height 500 J = 10 kg x 10 x... View Article
A force of 600 newtons will compress a spring 0.5 metres. What is the spring constant of the spring?
We know, F = kx 600 = k × 0.5 K = 600/0.5 K = 1200
Out of a pair of identical springs of spring constants 240 N/m, one is compressed by 10 cm and other is stretched by 10 cm. The difference in P.E. stored in the two springs is:
In both cases the P.E. will be kx2/2. Hence. the difference of energies will be zero.
A vehicle of 50 quintal climbs up a hill of 10 m. The potential energy gained by it is (take g = 10 m/s2)
mass = 50 x 100 = 5000 kg, g = 10 m/s2, h = 10 m Potential energy gained =... View Article
What is the relation between compressibility and Bulk modulus?
We know that the physics concepts compressibility and bulk modulus are interconnected. These two concepts mainly deals with pressure and... View Article
The potential energy of the spring when stretched
The potential energy of the spring increases because work is done on it when it is stretched.
You are in a lift moving from the 3rd floor to the 12th floor, through a height H. If the elevator moves at a constant speed without stopping, what is the work performed on you by the elevator? Take your body mass as M.
Answer: Newton’s third law of motion – According to newton’s third law of motion, the force exerted on the floor... View Article
Two trucks, one lightly loaded and one heavily loaded are moving with same speed. Then, it is easy to stop
It is easier to stop a lightly loaded truck as its Kinetic Energy is less that the heavily loaded truck.Kinetic... View Article
The process by which heat is transferred from one place to another without heating the intervening medium is known as
The process by which heat is transferred from one place to another without heating the intervening medium is known as... View Article
What is the velocity of radiation?
The velocity of radiation is same as the velocity of light, i.e. c = 3 X 108 m/s.
The mechanism of transfer of heat between two adjacent parts of a body because of their temperature difference is known as
The mechanism of transfer of heat between two adjacent parts of a body because of their temperature difference is known... View Article
