Answer:
 500 Joules 
Step-by-step explanation:
We are given;
- Force is 100 N
 - Distance is 5 m
 
We are required to calculate the work done;
- Work done is the product of force and distance.
 - That is, work done = Force × distance 
 - Work is measured in Joules 
 
Thus, in this case;
Work done = 100 N × 5 m
 = 500 Joules 
Thus, the work done in moving the box is 500 joules