Solving for Coefficient of Kinetic Friction

This energy was most likely converted into heat due to friction between the block and the table. The coefficient of kinetic friction can be calculated using the equation Ff = μkN, where Ff is the force of friction, μk is the coefficient of kinetic friction, and N is the normal force. In summary, the block's kinetic energy is converted into heat due to friction, and the coefficient of kinetic friction can be calculated using Ff = μkN.
  • #1
RedGuitar
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0

Homework Statement


You push a 2.0 kg block against a horizontal spring, compressing the spring by 15 cm. When you release the block, the spring forces it to slide across a tabletop. It stops 75 cm from where you released it. The spring constant is 200 N/m. What is the coefficient of kinetic friction between the block and the table?

Homework Equations


Ki + Uspi = Kf + Uspf


The Attempt at a Solution


i've already set Ki=0 and Uspf=0, but I'm having trouble finding the Vf
 
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  • #2
So you store energy in the spring, which is then transferred to the block. It then loses this energy and stops. Where did it go?
 
  • #3
what do you mean where did it go?

the block stopped 75 cm from where it was released
 

FAQ: Solving for Coefficient of Kinetic Friction

What is the coefficient of kinetic friction?

The coefficient of kinetic friction is a measure of the amount of friction between two surfaces when one is moving relative to the other. It is represented by the symbol μk and is a dimensionless quantity.

How is the coefficient of kinetic friction calculated?

The coefficient of kinetic friction can be calculated by dividing the force of kinetic friction by the normal force between the two surfaces. It can also be determined by measuring the acceleration of an object on a surface and using the equation μk = a/g, where a is the acceleration and g is the acceleration due to gravity.

What factors affect the coefficient of kinetic friction?

The coefficient of kinetic friction is affected by several factors, including the nature of the surfaces in contact, the roughness of the surfaces, and the presence of any lubricants or contaminants between the surfaces.

How does the coefficient of kinetic friction differ from the coefficient of static friction?

The coefficient of static friction is a measure of the amount of force required to start an object moving on a surface, while the coefficient of kinetic friction is a measure of the amount of force required to keep an object moving at a constant speed on a surface. The coefficient of static friction is typically higher than the coefficient of kinetic friction.

Can the coefficient of kinetic friction be greater than 1?

Yes, the coefficient of kinetic friction can be greater than 1. This means that the force required to keep an object moving on a surface is greater than the normal force between the two surfaces. However, in most cases, the coefficient of kinetic friction is less than 1.

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