What is friction?, Physics

Assignment Help:

What is Friction?

When we think about friction, there is one more place for energy to go - heat. When you push a book across a table, does the energy of the book change? Not if in the end, it is sitting still at the same height. Where did the energy from the work you did pushing the book across the table go? Into fighting friction, which does work but does not change the total energy of the book. It does no useful work. The energy used fighting friction goes into heat generated where the objects touch, the surface of the book and the surface of the table. Friction always uses up energy, because it always works against motion.


Related Discussions:- What is friction?

Electrostatics, A helium nucleus and a neon nucleus are separated by a dist...

A helium nucleus and a neon nucleus are separated by a distance of 3.0 nm. The charge of the helium nucleus is +2e while that of a neon nucleus is + 10e .Find the magnitude of the

Maxwells electromagnetic equations, Starting from Maxwell's electromagnetic...

Starting from Maxwell's electromagnetic equations in vacuum, get the wave equations for the four fields vectors E, D, B and H.

Electric spark, explain me about resistor in series

explain me about resistor in series

Reduce the expression for expected fringe shift, Deduce the expression for ...

Deduce the expression for expected fringe shift in Michelson Morley experiment. Discuss the result of experiment.

Explain about soft iron armatur, A force of 2.5kN is needed to lift a load....

A force of 2.5kN is needed to lift a load. How much work is done if the load is lifted by 500cm? An electromagnet exerts a force of 12N and moves a soft iron armature by a dist

Moment of disk or solid cylinder about axis, Moment of Disk or Solid Cylind...

Moment of Disk or Solid Cylinder about Axis We presume the axis of rotation is perpendicular to the disk and through its center and coincident with the axis of the cylinder. Co

Determine the b-h curves, Figure  shows the magnetic circuit of a relay. ...

Figure  shows the magnetic circuit of a relay. When each of the air gaps are 1.5mm wide find the mmf required to produce a flux density of 0.75 T in the air gaps. Use the B-

State isobaric process, In isobaric process pressure of the gas is constant...

In isobaric process pressure of the gas is constant overall the process. As, V/T is constant in isobaric process.

Zero gravity, what will happen if gravity becomes zero?is it possible in ea...

what will happen if gravity becomes zero?is it possible in earth?

What is acoustic holography, What is Acoustic Holography? Acoustic holo...

What is Acoustic Holography? Acoustic holography is a technique used to evaluate the sound field near a source through measuring acoustic parameters ahead of the source through

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