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???? S.M. Sachin ???? 7 years, 2 months ago
Posted by Anurag Gupta 7 years, 2 months ago
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Yogita Ingle 7 years, 2 months ago
Conservative forces are those for which work done depends only on initial and final points.
Example- Gravitational force, Electrostatic force.
Non-Conservative forces are those where the work done or the kinetic energy did depend on other factors such as the velocity or the particular path taken by the object.
Example- Frictional force.
Posted by Nandani Raghuwanshi 7 years, 2 months ago
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Yogita Ingle 7 years, 2 months ago
Angular Displacement Formula: The angular displacement is defined as the angle through which an object moves on a circular path. It is the angle, in radians, between the initial and final positions.
(θf - θi) = angular displacement
θ = s/r
θ = angular displacement through which movement has occurred
s = distance travelled
r = radius of the circle
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Yogita Ingle 7 years, 2 months ago
We can define momentum as the quantity of motion of the body. It is measured by mass × velocity , as momentum depends upon velocity, and it depends on the direction of the motion of the body as well.
Momentum = Mass × Velocity
p = mv
The S.I. unit of momentum is kilogram metre per second (kg ms-1)
Posted by Dileep Kumar 7 years, 2 months ago
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Yogita Ingle 7 years, 2 months ago
Streamline flow in fluids is defined as the flow in which the fluids flow in parallel layers such that there is no disruption or intermixing of the layers and at a given point, the velocity of each fluid particle passing by remains constant with time. Here, at low fluid velocities, there are no turbulent velocity fluctuations and the fluid tends to flow without lateral mixing. Here, the motion of particles of the fluid follows a particular order with respect to the particles moving in a straight line parallel to the wall of the pipe such that the adjacent layers slide past each other like playing cards.
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Yogita Ingle 7 years, 2 months ago
We shall derive the 1st and the 3rd law of motion fron the 2nd law.
Derivation of 1 st law: According to Newton's 2 nd law of motion,
F = ma
Where, F is the force applied, m is the mass of the body and a is the acceleration of the body.
So, In absence of a force,
F = 0
⇒ ma = 0
⇒ a = 0
Since, m cannot be zero for a body.
Zero acceleration means, body at rest will remain at rest and a body in uniform motion will continue its uniform motion. Which is Newton's 1st law of motion.
Posted by Rupesh Kumar 7 years, 2 months ago
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