how do i apply localy a force to an object?
PhysicsNode.applyImpulse() (use in simpleUpdatePhysics()) or PhysicsNode.applyContinuousForce()
Sry, i meant: the object should move to left from his local orientation.
whats the difference of local and global translation?
local is the translation from the parent node and global from the wolrdcenter, am i right?
Yes. So you have to get the current world rotation of your spatial and apply it to the force vector.