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A man attached a rope to a 30 kg box of books. He pulls with a force of 120 N at an angle of 60 with the horizontal. The kinetic friction is 33 N. Find the net force acting on the box.

Respuesta :

whitneytr12

Answer:

[tex]F_{net}=27N[/tex]

Explanation:

The forces acting on the box are:

The x-component of the pulling force [tex]F_{x}[/tex] and the friction force [tex]F_{fr}[/tex]. We assume positive in the direction of the pulling force in the x-component.  

[tex]F_{net}=F_{x}-F_{fr}[/tex]

[tex]F_{net}=Fcos(60)-F_{fr}[/tex]

[tex]F_{net}=120cos(60)-33[/tex]

[tex]F_{net}=27N[/tex]

I hope it helps you!

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