The magnitude of the force of static friction acting on the box is 75 N. Option D is correct.
What is static friction?
It is the frictional force between the two solid objects that are attached to each other.
It can be given by
[tex]F_s = mg \rm \ sin \theta[/tex]
Where,
[tex]F_s[/tex] - static friction
[tex]mg[/tex] - gravitational force = 112. 1 N
[tex]\theta[/tex] - inclined angle = 42°
Put the values in the formula,
Fs = 112.1 x sin42°
Fs = 75 N
Therefore, the magnitude of the force of static friction acting on the box is 75 N.
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