Guess I recommend doing that
Explanation:
The inertia of a 4 kg mass is four times as great as a 1 kg mass.
Answer:
The amount of work done in order to lift the box is 
Explanation:
Given the weight of each box is 
And the man lifts boxes at a height of 
We need to find the amount of work done.
The amount of work done is the product of applied force
that causes the displacement
.
In our problem force is
and displacement is
.
Now, work done

So, the amount of work done in order to lift the box is 
The air flows slower in a bigger space. The air in a small space hit each other heating up, and move faster and faster. is that what your asking?