Calculate the energy lost to friction

In summary, the conversation discusses the calculation of energy lost to friction using the formula E = μFn and the factors that affect this amount, such as surface type, roughness, force applied, and speed. It also explains how the angle of incline affects energy lost and how it can be reduced through the use of lubricants, smoother surfaces, and minimizing force and speed. The impact of energy lost to friction on efficiency is also mentioned, as it decreases performance and increases energy consumption.
  • #1
okgo
61
0
1. Homework Statement

http://i43.tinypic.com/i1bq1i.jpg
I need help with number 9

2. Homework Equations

Wnet=change in KE
Wnc=Change in Energy


The Attempt at a Solution


so I'm assuming the energy dissipated means the work done by friction?
so work of friction is umgcos(15)*d
d=cos(15)h
I got that work of friction is -9.8257
Help?
 
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  • #2
nvm I figured it out.
.2*mgcos15*d
and the d=h/sin15
:approve:
 

1. How is the energy lost to friction calculated?

The energy lost to friction can be calculated using the formula E = μFn, where E is the energy lost, μ is the coefficient of friction, and Fn is the normal force.

2. What factors affect the amount of energy lost to friction?

The amount of energy lost to friction depends on factors such as the type of surface, the roughness of the surfaces, the force applied, and the speed of the objects in contact.

3. How does the angle of incline affect the energy lost to friction?

The steeper the incline, the more energy will be lost to friction. This is because the normal force increases as the angle of incline increases, resulting in greater frictional force and thus more energy lost.

4. Can the energy lost to friction be reduced?

While we cannot completely eliminate friction, we can reduce the energy lost to friction by using lubricants, smoother surfaces, and minimizing the force and speed of objects in contact.

5. What is the impact of energy lost to friction on efficiency?

The energy lost to friction reduces the efficiency of any process by converting useful energy into heat. This can result in increased energy consumption and reduced performance of machines and systems.

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