What is the coefficient of kinetic friction for a wood block on a spring?

In summary, the conversation discusses a 0.570-kg wood block attached to a light horizontal spring with a spring constant of 180 N/m. When the block is compressed 4.4 cm and released, it stretches 1.7 cm beyond equilibrium before stopping and turning back. The question is to find the coefficient of kinetic friction between the block and the table. The suggested solution involves using the equation uk=mg/(k*x), with x representing the compression distance. However, a more appropriate approach would be to use an energy equation and solve for the coefficient using the stored energy in the compressed spring and the work done against friction.
  • #1
RileyAllen
7
0

Homework Statement


A 0.570-{\rm kg} wood block is firmly attached to a very light horizontal spring(k=180 N/m). It is noted that the block-spring system, when compressed 4.4 cm and released, stretches out 1.7 cm beyond the equilibrium position before stopping and turning back.
What is the coefficient of kinetic friction between the block and the table?

Homework Equations


F=uk*k*x
F=mg

The Attempt at a Solution


uk=mg/(k*x)
I don't know what x is, and even still I don't know if that is the correct way to do the equation.

Any help would be greatly appreciated.
 
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  • #2
x is the compression, 4.4 cm. Or the distance of stretch.
It looks like an energy question to me. Something like this:
energy stored in compressed spring = work done against friction + energy stored in stretched spring
I don't see the energy of a spring formula in your list: E = 1/2k*x^2
 
  • #3
I ended up solving this one. Thanks for replying though!
 

FAQ: What is the coefficient of kinetic friction for a wood block on a spring?

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