JayannaHamilton1250 JayannaHamilton1250
  • 06-01-2020
  • Physics
contestada

A box slides downwards at a constant velocity on an inclined surface that has a coefficient of friction uK = 0.58, find the angle of the incline, in degrees?

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boffeemadrid
boffeemadrid boffeemadrid
  • 07-01-2020

Answer:

30.11°

Explanation:

[tex]\mu[/tex] = Coefficient of friction = 0.58

g = Acceleration due to gravity = 9.81 m/s²

[tex]\theta[/tex] = Angle of incline

As the forces of the system are conserved we have

[tex]mgsin\theta-\mu mgcos\theta=0\\\Rightarrow mgsin\theta=\mu mgcos\theta\\\Rightarrow sin\theta=\mu cos\theta\\\Rightarrow \mu=\dfrac{sin\theta}{cos\theta}\\\Rightarrow \mu=tan\theta\\\Rightarrow \theta=tan^{-1}\mu\\\Rightarrow \theta=tan^{-1}0.58\\\Rightarrow \theta=30.11^{\circ}[/tex]

The angle of incline is 30.11°

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