- #1

Plutonium88

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## Homework Statement

A piano slides across a floor with a mass of 500kg.

A) solve for the normal force

B) A horizontal force 1300 is necessary to keep it in motion at constant speed find the coefficient of friction

## Homework Equations

Fnet = MA

## The Attempt at a Solution

Given: m= 500kg , fnetx=1300N

fnety= FN - FG = 0

Fn=Fg

FN=4900 N upward

b) fnetx = max = 1300N = -FFR

(i made my +x opposite the force of friction)

1300N = -FFR

1300 = mu*FN

mu = 1300/FN

mu = 1300/4900

mu= 0.265

Now a question arises...

I understand that ax must be 0 because it is at a constant velocity...

But I'm just curious because FFR = Fnetx

That means FFR= 1300N

So doesn't this mean that this unbalanced force will slow down the piano and not keep it at a constant motion? Anyways Yea i would appreciate some help please.