Explain the normal force - balanced forces, Physics

Assignment Help:

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.

791_friction.png

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.


Related Discussions:- Explain the normal force - balanced forces

Ray diagrams for concave mirrors, Ray Diagrams for Concave Mirrors Obj...

Ray Diagrams for Concave Mirrors Object Located Beyond the Center of Curvature: Ray diagrams are meaningful tools for denoting the location of an image as generates through a

Black body radiation, what is black body? explain black body radiation with...

what is black body? explain black body radiation with example

Explain laws of refraction, Laws of Refraction: There are two laws of r...

Laws of Refraction: There are two laws of refraction. The incident ray, the refracted ray and the normal to the surface of the point of incidence all lie at the similar plan

Find the minimum wavelength of x-rays, Q. Find the minimum wavelength of X-...

Q. Find the minimum wavelength of X-rays produced by an X-ray tube operating at 1000 kV. λmin = 12400 A 0 / V Therefore λmin = 12400 X 10 -10 / 10 6 = 0.0124 A 0

Calculate speed of simple harmonic motion, A point is operating simple harm...

A point is operating simple harmonic motion with a time period 2πs. At its mean position its speed is 0.05 m/s. Calculate its speed when it is at a distance of 0.04 m from the mean

Solid state, increase in potential with the increase in temperature differe...

increase in potential with the increase in temperature difference of two ends in a solid is called

The most probable radius finding the electron he+ is, The most probable ra...

The most probable radius (in pm) for finding the electron He + is: (1) 0.0    (2) 52.9    (3) 26.5                (4) 105.8 Ans:  (c)26.5

Standard quantum limit, Standard quantum limit: The restriction impose...

Standard quantum limit: The restriction imposed on standard methods of measurement through the uncertainty principle inside quantum mechanics.

Measurement of wavelength of monochromatic light, Q. Measurement of Wavelen...

Q. Measurement of Wavelength of Monochromatic Light? Monochromatic Light is allowed to fall on plate G 1 . The M.I. is adjusted for circular fringes. For this mirror M 1 is ma

Potentiometer, The emf of the driver cell of a potentiometer is 2V & its in...

The emf of the driver cell of a potentiometer is 2V & its internal resistance is negligible . The length of the potentiometer wire is 100cm & resistance is 5 ohm.How much resistanc

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd