You are pushing three equal boxes, 8kg each, with a force of 250 on the first.

What is the magnitude of the force of the first box on the second box?

_________N

What is the magnitude of the force of the third box on the second?

_________N

To find the magnitude of the force of the first box on the second box, we need to analyze the situation and apply Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.

Since you are pushing the first box with a force of 250 N, the first box exerts a force on the second box with the same magnitude but in the opposite direction. So the magnitude of the force of the first box on the second box is 250 N.

Now, to find the magnitude of the force of the third box on the second box, we can use the same reasoning. Since the three boxes are equal and the force applied on them is the same, the second box will exert an equal and opposite force on the third box.

Therefore, the magnitude of the force of the third box on the second box is also 250 N.