What is the work done by friction in a sliding mass on a 30 degree incline?

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Homework Help Overview

The discussion revolves around calculating the work done by friction on a 2 kg mass sliding down a 30-degree incline from a height of 10 meters, reaching a speed of 10 m/s at the bottom. The participants are exploring concepts related to energy conservation and the relationship between potential and kinetic energy.

Discussion Character

  • Exploratory, Conceptual clarification, Energy conservation

Approaches and Questions Raised

  • Participants discuss the initial potential energy and final kinetic energy of the mass, questioning how to relate these to the work done by friction. There is an exploration of the energy difference as a means to determine the work done by friction.

Discussion Status

Some participants have suggested that the work done by friction can be found by calculating the energy difference between the initial potential energy and the final kinetic energy. Others express uncertainty about the calculations and concepts involved.

Contextual Notes

There is a lack of clarity regarding the specific calculations needed to determine the work done by friction, and some participants are unsure about the underlying principles of energy conservation in this context.

striving
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Starting from rest and a height of 10m, a 2 kg mass slides down a 30 degree incline, reaching the bottom with a speed of 10 m/s. What is the approximate work done by friction? I don't know how to calculate the work done by friction , can someone help me please
 
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striving said:
Starting from rest and a height of 10m, a 2 kg mass slides down a 30 degree incline, reaching the bottom with a speed of 10 m/s. What is the approximate work done by friction? I don't know how to calculate the work done by friction , can someone help me please

What concept would you utilize here? You know the initial conditions and the final conditions.
 
Think in terms of energy conservation. At the top of the incline the mass had a certain potential energy due to gravity and its height. At the bottom of the incline it had a kinetic energy as dictated by its velocity.
 
so the work done by friction will be the energy difference between initial potential energy and final kinetic energy?
 
Where else would it go?
 
i hate to say that, but be honest i don't know
 
striving said:
so the work done by friction will be the energy difference between initial potential energy and final kinetic energy?

Yes, will give you the work done by friction.


striving said:
i hate to say that, but be honest i don't know
 

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