system
Given the following post, respond as if you're commenting on Reddit:
human
How come Captain America's shield can slice through rope, but it bounces off of people?

I've read that Captain America's shield is composed of a vibranium-iron alloy (vibranium is a fictional element capable of absorbing all vibrations as well as all kinetic energy) that was created under unknown circumstances (guy fell asleep while messing with vibranium and iron, woke up and the metals had fused).
I was wondering if the above was consistent with four properties of Captain America's shield:

1. As I said earlier Captain America's shield absorbs all vibrations and kinetic energy, and when the shield is hit by a huge force (such as Hulk punching it) Captain America may be sent flying backwards but feels no shock from the punch alone.

2. When thrown (the shield is a concave disc and is almost like a very light and effective frisbee) the shield can hit and bounce off of multiple walls without losing any energy other than the energy lost through air friction and gravity (know nothing about physics, don't even know if gravity can cause a thrown object to lose forward energy).

3. Captain America's shield is sharp and when thrown by Captain America, at least, can cut through a rope ladder that is hanging from a helicopter.

4. Captain America's shield bounces off of people in the same way it bounces off of walls, even if it hits a person's back while that person is wearing no clothing on the torso.

Anyone mind helping in explaining if all of these properties are consistent with eachother?
gpt
There are subtle differences in how he throws his shield depending on what he wants it to do.  He's an expert with the weapon that few can match (bullseye and taskmaster come to mind).

Think of all the crazy shenanigans a pool shark can make a billiard ball perform, now image one exposed to vita rays and super soldier serum.