A piece slides down a slippery plane plane slowing from 10 km/h to 5km/h -- what is the friction coefficient?

[gladidi]

Homework Statement

the piece is a slippery horizontal plane from 10 km / h. The speed changes due to friction at a distance of 23 m to a final speed of 5 km / h. Determine the coefficient of friction.

Relevant Equations

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I don't know how solve this..

[User has been reminded by the Mentors to show their work on schoolwork problems]

 

[haruspex]

I presume there was a diagram, or maybe just a rather more informative description.

At a guess, the set up is:
"A block slides on a horizontal plane. It starts at speed 10km/h, but friction reduces this to 5km/h over a distance of 23m."

Per forum rules, you need to show an attempt.
What standard equations have you been taught that may be relevant?

 

[gladidi]

I presume there was a diagram, or maybe just a rather more informative description.

At a guess, the set up is:
"A block slides on a horizontal plane. It starts at speed 10km/h, but friction reduces this to 5km/h over a distance of 23m."

Per forum rules, you need to show an attempt.
What standard equations have you been taught that may be relevant?

"A block slides on a horizontal plane. It starts at speed 10km/h, but friction reduces this to 5km/h over a distance of 23m." This is all what is stated in the assignment. I would have solved if the mass had been told ..

 

[haruspex]

"A block slides on a horizontal plane. It starts at speed 10km/h, but friction reduces this to 5km/h over a distance of 23m." This is all what is stated in the assignment. I would have solved if the mass had been told ..

So let the mass be m and see what happens.