VR slow motion and the speed of objects

I’m kind of new to ue4 and I am trying to make time slow down in vr. For the slow down part, everything is ok: everything is in slow motion exept for the player (which is exactly what I want). However, when the player grabs an object and throws it, the object gets a lot more speed than in real time (which makes sense because if the player moves 10 times as fast as the world around him, he will be able to launch things 10 times faster). I tried resolving this issue by dividing the object’s velocity by 10 but it doesn’t work. Can anyone help me with this please?

PS: here is my code to divide the object’s velocity