Coefficient of Kinetic Friction

In summary, a snowboarder with a mass of 71kg and a velocity of 16m/s skids to a stop after moving a distance of 9.4m. The force of kinetic friction acting on the snowboarder is 950N. To determine the coefficient of kinetic friction, the equation relating force of friction, mass, and coefficient of friction should be used. This equation can then be applied to Newton's Law to solve for the coefficient of kinetic friction.
  • #1
lahle1
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At the bottom of a hill, a snowboarder with a velocity of 16m/s (FWD) skids to a stop after moving a distance of 9.4m. The mass of the board and rider is 71kg, and the magnitude of the force of kinetic friction during the skid is 950N.

Determine the coefficient of kinetic friction during skidding.

How would I go about solving this problem? What equations do I need to use?
 
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  • #2
lahle1 said:
At the bottom of a hill, a snowboarder with a velocity of 16m/s (FWD) skids to a stop after moving a distance of 9.4m. The mass of the board and rider is 71kg, and the magnitude of the force of kinetic friction during the skid is 950N.

Determine the coefficient of kinetic friction during skidding.

How would I go about solving this problem? What equations do I need to use?

Welcome to the PF.

In the material that you have been studying, there will be an equation relating the force of friction to the mass of the object and the coefficient of friction. Can you write that equation for us?

And then how will you apply it to this problem? Write the equation for Newton's Law, and describe how to use it in this problem...
 

What is the Coefficient of Kinetic Friction?

The Coefficient of Kinetic Friction is a measure of the amount of friction between two surfaces in motion. It is represented by the symbol μk and is a dimensionless number that ranges from 0 to 1.

How is the Coefficient of Kinetic Friction calculated?

The Coefficient of Kinetic Friction is calculated by dividing the force of kinetic friction (Fk) by the normal force between the two surfaces (N). The equation is written as μk = Fk/N.

What factors affect the Coefficient of Kinetic Friction?

The Coefficient of Kinetic Friction is affected by several factors, including the roughness of the surfaces, the weight of the objects, and the materials they are made of. It also depends on the presence of any lubricants or other substances between the two surfaces.

What is the difference between Coefficient of Kinetic Friction and Coefficient of Static Friction?

The Coefficient of Kinetic Friction measures the amount of friction between two surfaces in motion, while the Coefficient of Static Friction measures the amount of friction between two surfaces at rest. The Coefficient of Kinetic Friction is typically lower than the Coefficient of Static Friction.

Why is the Coefficient of Kinetic Friction important?

The Coefficient of Kinetic Friction is important because it helps us understand and predict the behavior of objects in motion. It is also a crucial factor in designing and engineering machines and structures that require moving parts, as it affects their efficiency and performance.

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