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Homework Help Overview

The problem involves a force applied to a box on an inclined plane, with a connection to another box on the floor via a cord. The scenario is set in a frictionless environment, and participants are tasked with determining the tension in the cord connecting the two boxes.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the equations of motion for both boxes and question the correctness of their equations. There is an emphasis on the importance of a free body diagram for visualizing forces acting on the boxes.

Discussion Status

Some participants have attempted calculations for tension based on their equations, while others have raised the need for a free body diagram to support their reasoning. There is an ongoing exploration of the problem setup and assumptions made regarding the forces involved.

Contextual Notes

Participants express uncertainty about the equations used and the necessity of a free body diagram, indicating a potential gap in understanding the problem's setup. The discussion reflects a collaborative effort to clarify these aspects without reaching a definitive conclusion.

phyzziksn00b
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Homework Statement


In Figure 5-65, a force of magnitude 13 N is applied to a FedEx box of mass m2 = 1.2 kg. The force is directed up a plane tilted by ? = 38°. The box is connected by a cord to a UPS box of mass m1 = 5.0 kg on the floor. The floor, plane, and pulley are frictionless, and the masses of the pulley and cord are negligible. What is the tension in the cord?

Homework Equations


m1a=T
m2a=F-T-m2gsin(theta)
(im not sure if these are right)

The Attempt at a Solution


T=F-m2gsin(theta)
T=(13)-(1.2)(9.8)(sin38)
T=5.75982105
 
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phyzziksn00b said:

Homework Statement


In Figure 5-65, a force of magnitude 13 N is applied to a FedEx box of mass m2 = 1.2 kg. The force is directed up a plane tilted by ? = 38°. The box is connected by a cord to a UPS box of mass m1 = 5.0 kg on the floor. The floor, plane, and pulley are frictionless, and the masses of the pulley and cord are negligible. What is the tension in the cord?

Homework Equations


m1a=T
m2a=F-T-m2gsin(theta)
(im not sure if these are right)

The Attempt at a Solution


T=F-m2gsin(theta)
T=(13)-(1.2)(9.8)(sin38)
T=5.75982105

Can you please draw the free body diagram and attach it? You cannot possibly do these problems without a free body diagram (Well, that's not true, but it's a stupid idea to do these without one)
 
<img src="http://img.photobucket.com/albums/v48/CianiMoni235/FBD.jpg">

i think this is right? sorry about the weird way i drew it
 
Last edited by a moderator:
ahh why doesn't it show up?
does it work if you just copy and paste the link into the browser?
 

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