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game-physicsfarseer

How to determine if a force is making a difference

I'm making a game in which I'm creating an animation system that speeds up based on the velocity of the character.

The problem is this won't work for the instance of a treadmill.

I do not have the speed of the treadmill, but I do have the force of the friction between the treadmill and the character.

I'm trying to determine if a force is making a difference. Knowing Only the forces that are being applied to an object, its weight, and its velocity, how would you determine if a single force is making a difference in it's velocity, and if so, how much?

Solution 
  • F = m*a

a = d/dt v

    With finite differences:

    a = (v2-v1)/dt

    And therefore the relationship:

    F = m * (v2-v1)/dt

    I hope, this helps :-)