Mechanical Energy: Calculating Work w/ Box, Ramp & Friction

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Homework Help Overview

The discussion revolves around calculating the work required to push a box up a ramp, considering both gravitational potential energy and frictional forces. The problem involves a 36 kg box being moved a distance of 10 m up a ramp that elevates it 1.7 m above the ground, with a friction force of 20 N acting against the motion.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the components of work involved, specifically work against gravity and work against friction. There is uncertainty about how to incorporate the friction force into the calculations.

Discussion Status

Some participants have provided guidance on how to approach the problem by identifying the need to calculate work against both gravity and friction. However, there is still uncertainty regarding the application of the friction force over the distance moved.

Contextual Notes

Participants are navigating the specifics of the friction force and its application in the context of the ramp's incline and the distance traveled. There may be assumptions about the ramp's angle or the nature of the friction that have not been explicitly stated.

billyghost
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How much work was required to push a 36 kg box from the bottom of a ramp a distance of 10 m to the top of 1.7 m above the ground if the friction force between the box and the ramp is 20 N? Help? Formulas?
 
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To push the box up the ramp required:
(1) work against gravity (which equals the increase in gravitational potential energy).
(2) work against friction (think W = Force x Distance).

Figure these two out and add them to find the total work required.
 
The 20 N friction force is the part I'm unsure about.
 
You know the force needed to overcome the friction (20 N). So over what distance do you have to push against friction in raising the box?
 

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