Answer:
15 N North
Step-by-step explanation:
From the question given above, the following data were obtained:
Force of air (Fₐ) = 40 N North
Force of gravity (F₉) = 25 N South
Net force (Fₙ) =?
The net force causing the box to accelerate can be obtained as follow:
Fₙ = Fₐ – F₉
Fₙ = 40 – 25
Fₙ = 15 N North
Thus, the net force causing the box to accelerate is 15 N North