ANSWERS: 2

Zero. The force on any face of the box is equal to the force on the opposite face. Otherwise, the box would move.


1!TellyI'm afraid the force isn't zero. The 'work done' by that force is zero.


Pressure is defined as force per unit crosssectional area. P = F/A therefore F= P*A now, crosssectional area = 20*20 = 400 msq(assuming the box is a cube of length 20m) Therefore, Force = 12*400 = 4800 N
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