Homework Help: Physics

Posted by Michael on Saturday, November 3, 2012 at 5:06pm.

A physics student is pulling on a 20 kg box that is sliding on the floor. The student applies a pulling force of 100 N using a rope at angle 30o
from the horizontal. The coefficient of kinetic friction between the box and the floor is 0.4. The acceleration of the box is closest to?

Physics - Elena, Sunday, November 4, 2012 at 3:38pm
ma=Fcosα-F(fr)
F(fr) =μmg
a= (Fcosα- μmg)/m

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