Relative velocity in free fall

If a person jumps out of a plane, and a few seconds later, another person jumps, why is it that the difference in their velocities stays the same? Shouldn’t it decrease because eventually, the first diver will reach maximum velocity, but the other diver will be slower at first, but then he reaches max. velocity [...]

An interesting question based on Relativity (Time dilation and the Twin Paradox)

Yes, this is similar to the twin paradox, but with a few changes: Two brothers set off from earth to make a round trip of 30 light years in total. The first brother, say Albert, has a ship that travels at 10% the speed of light so his journey will take him 300 years and, [...]

Idea on origin of Gravity – A discussion

Derek shares his idea on origin of Gravity – “if you were to suddenly put a large object in space then the space would  be pushed out to the sides (displacement) . because the object  is now in the place were space once  occupied ?? so space is just pushing  back to its original area ???? is this what gravity is??? or [...]