How to set character weight?

You can see my idea in the photo bellow. The first cube have 100k kg weight, if I put on the ramp the other cube with weight 1kg it will fly in the space, but if I put the character he just get pushed little 5-10cm and nothing happens no matter what weight have. I know I must to have enabled physics on the character capsule and then everything works, but even when he haven’t physics he have same movement when the 100k cube fall on the ramp. Is here any way to detect force from bellow and enable the character physics?