Sadly, the question is illogical, unscientific, unlikely, and generally unclear on the concepts.
==> You don't "weigh" any kilograms. Your MASS may be measured in kilograms, but your weight depends on the acceleration of gravity in the place where you happen to be located.
==> If your mass were 4 kg, then your weight on Earth would be about 39.2 Newtons. That's a little less than 9 pounds. You definitely wouldn't be doing any jumping, and it's doubtful that you would have any friends yet.
==> Whatever acceleration you jump up with, you can only LAND with 9.8 m/s² of it. That's the acceleration of gravity on Earth. Once you reach the peak of your jump and start falling, it's the only possible acceleration you can have (unless somehow you're falling through honey or styrofoam).
==> You don't hit with force. If you manage to land square on top of your friend, the force you both feel depends on
. . . how fast you're moving when you hit
. . . how fast your friend is or isn't moving when you hit
. . . how long it takes you to come to a stop after you hit.
Remember . . . you may be falling at 10 m/s when you hit, but that doesn't tell you much. The force you feel when you hit depends a lot more on whether you land on the trampoline, on the water, on the grass, on your sister, on a pile of leaves, on the dog, or on the concrete.