physics
posted by bryan .
a boy pulls a 15 kg over level ground by a rope with a force of 50 newtons at 30 degrees above the horizontal, the coefficients of friction between the box and the ground are 0.3 and 0.4, calculate the normal force exerted on the box to the ground, calculate the acceleration of the box, the boy suddenly increases his pulling force on the rope, what happens to the normal force exerted on the box does it increase, decrease, or stay the same

physics 
bobpursley
and what are your thoughts?
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