As we know that mass of the box is given as
m = 9.5 kg
acceleration of the box is given as

so by Newton's II law we can say

now we can substitute all the values in it


So it required 9.5 N force to slide it
Answer:

Explanation:
Hello.
In this case, since the velocity is computed via the division of the distance traveled by the elapsed time:

The distance is clearly 1743 km and the time is:

Thus, the velocity turns out:

Which is a typical velocity for a plane to allow it be stable when flying.
Best regards.