Applying acceleration rather than add force

Working on a space simulation game, created some custom functions in C++ to accurately calculated force of gravity with doubles,
however im applying the force to space crafts using the “add radial force component” in BP, but from what ive read it inputs units in KG/cm2
this results in having to multiply my final equation by weird amounts in order to get the correct effect,
Is there a way to have a custom function that can apply set acceleration per second rather than a force

in the image, g= represents acceleration in m/s from the equation