Chopper towing sensor, what is the tension?

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Homework Help Overview

The problem involves a helicopter towing an airborne laser sensor with a specified mass and horizontal acceleration. The original poster seeks to determine the tension in the cable while noting that their initial approach may not be applicable due to the horizontal nature of the motion.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the forces acting on the sensor and the need to consider vector addition due to the horizontal acceleration. There is an emphasis on understanding the direction of acceleration and its implications for calculating tension.

Discussion Status

Some participants have offered suggestions for visualizing the problem through diagrams and have raised questions about vector addition. The original poster expresses difficulty with the mathematical concepts involved, indicating a need for further clarification.

Contextual Notes

The original poster mentions a rapid pace of learning in their course, which may be contributing to their challenges in understanding the problem. There is also a reference to a specific answer that they believe is correct, but they are unsure how to arrive at it.

broginator
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Homework Statement


A helicopter is flying at a constant altitude towing an airborn laser at 129kg. Both the chopper and the sensor move only horizontaly and have a acceleration of magnitude 2,84 m/s2. ignoring air restitance find the tension on the cable towing the sensor.

Homework Equations



The Attempt at a Solution


T= mg + ma

T=129kg x 9,8 m/s2 + 129kg x 2,84 m/s2.
this equation only work if the chopper were flying vertical.
The right answer is 130N but need to know how to get there.
 
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Try drawing a diagram and identify the forces on the "laser"
 
broginator said:
T= mg + ma
That is true as a vector equation, but if you mean as scalars then you have to worry about direction. Which way is the acceleration? Do you know how to add vectors?
 
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the acceleration is horizontal so it is orthogonal. no don't know how to ad vetors, we are having 1 chapter a day and my math skills are shitty so can't quite hold on the pace..
 
broginator said:
the acceleration is horizontal so it is orthogonal. no don't know how to ad vetors, we are having 1 chapter a day and my math skills are shitty so can't quite hold on the pace..
It's just like adding displacements that need not be in the same straight line. If you go 1m N then 2m E (not too near the poles!) how far are you from your start point?
 
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