Calculating work for a weightlifter.

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Homework Help Overview

The problem involves calculating the work done by a weightlifter lifting a set of weights, specifically focusing on the physics of work in a gravitational context.

Discussion Character

  • Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to calculate work using the formula W=F∆x, applying the force and distance given in the problem.

Discussion Status

The discussion includes feedback on the original poster's calculation, with some participants confirming the same value while others suggest re-evaluating the calculation for accuracy. There is an acknowledgment of a mistake by one participant, indicating an ongoing dialogue about the correctness of the computations.

Contextual Notes

Participants are working within the constraints of the problem statement and are focused on ensuring the calculations align with the physics principles involved.

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Homework Statement


A weight lifter lifts a set of 390 N weights from ground level to a position over his head, a vertical distance of 1.75m. How much work does the weight lifter do, assuming he moves the weights at a constant speed?

I am not confident in my physics skills so I am really looking for someone to grade my work and give me feedback; thanks!

Homework Equations


W=F∆x


The Attempt at a Solution


W=(390N)(1.75m)=682.5 Joules
 
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W=(390N)(1.75m) looks good!
I get a slightly different answer than your 682.5; better run it through the calculator again.
 
I would like to point out that I get the same value as OP.
 
My mistake; thanks for catching it.
 

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