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Aboxissittingonadesk. Theboxhasamassof52kg. Whatis the magnitude of the normal force acting on the box by the desk? What is the weight of the box?
-- The weight of the box is (mass) x (acceleration of gravity) =
(52 kg) x (9.81 m/s²) = 510 newtons (rounded) .
-- The normal force of the desk pushing up on the underside of the box must be exactly the same 510 newtons (rounded). If the vertical forces acting on the box were not balanced, then the box would be accelerating vertically.
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