Moon escape velocity: 2.38 kms per second.Earth escape velocity: 11.2 kms per second
Fun fact: the moons escape velocity is 2.38 kms per second. Lot less than Earth!
Must be traveling faster than light to escape a black holes gravitational pull.
That´s why black holes are so dark, light can not escape!
All right, back to the scenario. Let's say John has pushed off some the ship and is heading toward the black hole. What's going to happen to him?
Because black holes are made when the mass compacts on itself in a small area. There is a very strong gravitational pull. Ever heard of escape velocity, basically the speed needed get out of someplace with a gravitational pull? Earths is 11.2 kms per second.
Steller black holes are smaller and more common, as far as common means with black holes.
There is a black hole at the center of our glaxiy, the milky way! In fact, there is a super massive blakc hole at the center of every glaxity!
Meanwhile, a black holes escape velocity is the speed of light. That´s right, you would need to be going over the speed of light to get out of a black hole!
For every black hole, there is an event horizon, the point of no return. Once you pass this point, there is no turning back, you cannot escape. The line above represents the event horizon. John has just passed the point of no return.
Now what happens next depends on what kind of black hole John has fell in. There are two types, steller and super massive. Steller black holes are smaller, and super massive black holes are much, much bigger.
Fortunately John did not fall in a steller black hole. If he had, he body would be stretched out in a process known as spaghettification, which would kill poor John before he even entered the black hole. This is due to the strong gravitational pull on John.