Solve Bobsled Problem: Find How Far Does It Travel Up a 30 Degree Incline

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Homework Help Overview

The problem involves a bobsled traveling up a 30-degree incline after a race, where it is subjected to kinetic friction. The sled's initial speed is given, and the goal is to determine how far it travels up the incline before coming to a stop.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the impact of mass on the calculations, with one suggesting that it can be assumed to be any value since it will cancel out. Others express uncertainty about setting up the equations and finding the distance traveled.

Discussion Status

Some participants have proposed using energy methods instead of force, while others are attempting to calculate resultant forces. There is a mix of approaches being explored, and guidance has been offered regarding the treatment of mass in the equations.

Contextual Notes

Participants note the absence of mass in the problem statement and express confusion about how to proceed without it. The discussion reflects varying levels of understanding regarding the application of physics principles to the problem.

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Homework Statement


After a bobsled race, the sled and riders have been partially slowed down up in an icy incline, but they need to be brought to a stop. This happens on a portion of track inclined at 30 degrees that has a coefficient of kinetic friction of 0.60. The sled enters the incline at 25.0 m/s. How far does it travel along the incline before stopping?


Homework Equations


Ff=UFn
Fn=mgcosO
f=ma

The Attempt at a Solution


I couldn't find a way of doing it, since the , mass isn't given, maybe I'm overlooking something?
 
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Take any mass you like, say 100 kg. It should cancel out in the end.
 
how would you set up the equation? and also I am sort of clueless on how to find how far the sled goes... sorry.
 
Last edited:
I got as far as finding the resultant force for the vectors, which i got was 2000N, but that's as far as i got.
 
I think I would be inclined to use energy rather than force.
 
ok so using the formula 1/2vi^2=FG(cos 30) d
and solving for D, in which i got 88.28, would that be correct?
 

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