Respuesta :

Answer:

2340 N

Explanation:

There are two forces on the box.  Weight force pulling down and resistive force pushing up.

Sum of forces in the y direction:

∑F = ma

F − mg = ma

F = mg + ma

F = m (g + a)

F = (300 kg) (9.8 m/s² + (-2 m/s²))

F = 2340 N