Verifying Calculating Force on Elevator Support Cable

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Homework Help Overview

The discussion revolves around calculating the force acting on an elevator's support cable, given its mass and upward acceleration. The subject area pertains to dynamics and forces in physics.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to apply Newton's second law (F=ma) to determine the force, incorporating gravitational acceleration into their calculations. Some participants affirm the calculations, while others provide insights on significant figures and their relevance to the problem.

Discussion Status

The discussion shows participants providing feedback on the original poster's calculations, with some affirming the correctness of the approach. There is an ongoing exploration of significant figures, and the original poster expresses confidence in their understanding, indicating a productive exchange of ideas.

Contextual Notes

The original poster mentions that this is part of a take-home test, which allows the use of the internet for assistance, raising questions about the nature of the assignment and the expectations surrounding it.

ilkjester
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Pretty sure I got it right just going to ask you guys to make sure.

Homework Statement


An elevator with a mass of 1.10e3 accelerates upward at 0.45 m/s squared. What is the force acting on the elevator's support cable?


Homework Equations


F=ma


The Attempt at a Solution


The 9.8 is for gravity.
f=(1.10e3)(0.45+9.8)
f=1.12e4
I think I got the right amount of sig figs to but I am not to good with those.
 
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Looks right to me.
 
Looks good. The general rule of thumb for the # of sig figs is to look at the original problem; whatever the LOWEST amount of sig. figs. used in the problem statement is, is what you should give your answer in.

Casey
 
Thanks guys We have a take home test this week and I am feeling pretty good about it. I don't get the whole take home part though because were aloud to use the internet and whatever but if i have any questions ill be sure to ask.
 

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