Gravity Bowling Ball Rubber Sheet

The flaw is this.

Gravity bowling ball rubber sheet.

This comic refers to a common analogy used to explain how mass distorts space time a bowling ball resting on a sheet of rubber distorts the sheet due to its weight. This is the result of using a two dimensional analogy of a three dimensional universe. General relativity requires a curvature of space time not just space. Both are curved by mass and everybody takes eucledean cartesian type flat graphs of say x and t as a matter of course.

It thus makes it seem like gravity pulls the golf ball down because the bowling ball pulls the rubber sheet down. In space it will follow a straight line and go over any hole on the surface. Since i read cosmos long ago i see the same analogy about the balls rolling on a rubber sheet used to explain how gravity works. You can calculate this gravitational force as the product of the mass m and the gravitational field g.

The distortions in the rubber sheet representing the distortions in space and time. The typical rubber sheet bowling ball analogy to explain gravity visually in layman s terms always seems to be two space dimensions. This is nothing at all like the way general relativity works. But a ball rolls on a surface because gravity is pulling it down.

The bowling ball has a greater mass so it also has a greater gravitational force. The system has some qualitative features in common with gravity. Hd is short for high density which lowers the rg and raises the differential of the weight block. The point is there is no pushing going on in the general relativistic model of gravity.

In the cartoon image of einstein s explanation of gravity a rubber sheet is pulled tight and a bowling ball is placed in the middle. In the classic classroom rubber sheet demonstration the marble rolls toward the bowling ball because the earth s gravity causes it to roll down hill. It isn t just warped space that s involved it is warped space time. The rubber sheet analogy only works even for the orbits if you assume that the orbiting object tends to want to roll down hill in the dip made by the bowling ball.

Just placing an object somewhere in that dip will result in it rolling down the slope towards the bowling ball. The gravity of the situation this shape can power through just about anything. It is said that a massive object curves space time just like a bowling ball on a rubber sheet and another object near the massive object simply rolls down hill on the rubber sheet that is the reason why we observe that the other object is experiencing gravitational attraction to the massive object which curved the space time. Why don t we use one dimension of space and the other of time.