Question

Going further:
What is the difference between 500n force and a - 500N force in the simulation

Answer 1

Those two forces have the same strength but they act in opposite directions.

Answer 2

Step-by-step explanation:

force is a vector quantity, therefore 500N force indicates that it is applied forward while -500N indicates that it is applied opposite to the progressive direction. the forward being the direction considered positive.

hope it helps :)