Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Explain the Friction
Friction is a force that works against all motion. It slows everything down and it is the reason that the motion we are most familiar with always seems to slow down and stop. It occurs any time two surfaces move against each other.
On a cold morning you might rub the palms of your hands together and use the heat created by the friction of your hands' rubbing to make your hands feel warmer. The brakes in a car use the force of friction to bring your car to a stop.
In your experience, do some situations have more friction than others? What does it depend on? Let's compare two situations - sliding a heavy box of books on a tile floor or on a carpet. In which situation would you need less force to move the box? On the tile, of course. Why? Because a smooth surface such as tile offers less friction when sliding a box than a rough surface like carpet. Can you think of a surface that would offer even more friction to sliding? How about blacktop or asphalt? So the amount of friction depends on how rough or smooth the surface is.
What else does the force of friction depend on? What if you are sliding an empty box or the same box loaded with books, which is easier? The empty box, of course. Less weight pushing down on the surface means you have to use less force to overcome friction. This leads to one way frictional forces can be represented as:
Ff = μN
where Ff is the frictional force in Newtons, μ is the coefficient of friction (pure number) and can range from .01 to .99 with larger values for rougher surfaces and N is the normal force in Newtons, the force that the surface holding the box pushes up against the box. The frictional force is always in the direction opposite to any motion.
explain air wedge
two bodies of masses 200 g and 300 g are tied to a string which is passed over a pully.if pully has no weight and friction,then find the accerlation of the bodies and tension in th
What is Slowly Leaking Box? An ideal gas of atoms of number density at an absolute temperature is restricted to a thermally isolated container that has a small hole of area A
DECADE resistors are wire wound resistors. These are wound on cards moulded on round a switch of low contact resistance. Alloys used for wire are Manganin, minalpha, etc. Bifilar w
what is meant by positive deviation of beer lambert''s low?
A spring is held vertically downward and a current is passed through it . Then the length of the spring : A . increases B. decreases C . does not change D the spring osc
Motion of an object in a straight line is called one dimensional motion. The location of a particle in one dimensional motion can be explained by only one variable (say x). For a p
A wave front is a line or surface on which the disturbance has the similar phase at every position. If the source is periodic, it generates a succession of ray front, each of the s
Lens: A transport refractive body bonded by one or two spherical surface known as lens. There are various kinds of lenses. e.g. Double convex Lens Double concave lens
magnetic devices & functions
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd