Give a very short answer to the question given below:
 
A man pushes four boxes of different mass.

The table shows the acceleration produced for each box during the push.
 
Mass of the box
(\(kg\))
Acceleration produced
(\(m/s^2\))
1 2000
20 100
25 80
160 12.5
 
What amount of force does the man exert on each box? Is the force acting on each box unbalanced?
 
The formula to calculate the force is,
Here, in each case, the force is 
Here, the force acting on each box is as acceleration in each case and each box gets pushed.