# Physics find angle of inclined plane! help?

URGENT physics find angle of inclined plane! help!?

## Homework Statement

A block slides down an inclined plane at a constant velocity of 0.14m/s. The coefficient of kinetic friction is 0.45. What is the angle of inclination?

## Homework Equations

Fnetx = Fk -mgsintheta
Fnety = FN -mgcostheta

## The Attempt at a Solution

FN-mgcosΘ = 0
FN =mgcosΘ

FN µK –mgsinΘ =0
FN = mgsinΘ/.45

mgcosΘ = mgsinΘ/.45
.45 = mgsinΘ/ mgcosΘ
.45 = tanΘ
tan-1.45 =Θ
24⁰ =Θ

Is this correct? What I don't understand is that shouldn't Fnetx include an Fapp? The question doesn't give a value for Fapp so I don't how you would use it to find the answer.

tiny-tim
Homework Helper
hi crosbykins! (have a smaller theta: θ and try using the X2 icon just above the Reply box )
What I don't understand is that shouldn't Fnetx include an Fapp? The question doesn't give a value for Fapp so I don't how you would use it to find the answer.

yes that looks fine i'm not sure what you mean by Fapp

the block is simply sliding under gravity (any force that pushed it to get it started has been removed)

Thank you so much for the help tiny-tim!