May I have some help on part D. : A box with mass m = 15 kg is sinking with cons

Question

May I have some help on part D.

: A box with mass m = 15 kg is sinking with constant acceleration aT = 1.9 m/s2 into the level ground. The free-fall acceleration is g = 9.81 m/s2. Please answer the following questions. 14% Part (a) Write an expression for the magnitude of the force of gravity on the box, Fg, in terms of the given quantities and variables available in the palette.
14% Part (b) Calculate the magnitude of the force of gravity on the box, Fg in Newtons.
14% Part (c) In what direction does the force of gravity act? 14% Part (d) Write an expression for the magnitude of the total force of the system in the y-direction, FT, in terms of the forces of the system. aT Otheexpertta.com

Explanation / Answer

by Newton's second law,

total force acting on the system is given by

ma t

let N be the normal reaction acting in the upward direction

so, net force in downward direction = mg-N

so, mg-N = mat

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