Skier velocity and friction problem

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Homework Help Overview

The problem involves a skier being pulled up a slope at a constant velocity, with specific parameters including the slope's angle, the skier's mass, and the coefficient of kinetic friction. The objective is to determine the force exerted by the tow bar on the skier.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to relate the slope's angle to acceleration and considers using trigonometric functions to analyze the forces involved. There is uncertainty about how to incorporate friction into the analysis.
  • Some participants suggest drawing a force-body diagram to evaluate the forces acting on the skier.
  • Another participant recommends defining a coordinate system and applying Newton's Second Law to identify the forces in both the x and y directions.
  • One participant notes that since the skier is moving at a constant velocity, the net forces should sum to zero.

Discussion Status

The discussion is actively exploring different approaches to analyze the forces acting on the skier. Participants are providing guidance on visualizing the problem through diagrams and applying fundamental physics principles, but there is no explicit consensus on a single method or solution yet.

Contextual Notes

Participants are navigating the constraints of the problem, including the constant velocity condition and the role of friction, which remains a point of confusion for the original poster.

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Homework Statement



a skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 30.0° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 53.0 kg, and the coefficient of kinetic friction between the skis and the snow is 0.190. Find the magnitude of the force that the tow bar exerts on the skier.

Homework Equations





The Attempt at a Solution



since i know the slope is the acceleration i believe.
couldn't i just solve for acceleration, and maybe get more parts of the picture through trig from vector components?

I'm not sure how to use the friction though.
is there an equation that will help?
 
Physics news on Phys.org
"a skier is pulled up a slope at a constant velocity"

draw a force-body diagram and evaluate your forces and how you can solve for F.

visit my blog if you need examples.
 
Last edited:
Begin by defining a coordinate system (where you would like to place the x-axis), and tell me the forces that act in the x and y directions by using Newton's Second Law.
 
What rocophysics means is that since there is constant velocity, all forces should add to zero.
 

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