How much time would it take for a free-falling ghost-like object to cross the entire Earth?
2998
If it was possible to dig a hole that went from one side of the Earth to the other...
45708
Why do far away objects appear to move slowly in comparison to nearby objects?
39282
The Time That 2 Masses Will Collide Due To Newtonian Gravity
107478
Equation of motion of a free particle
141399
Throwing a ball from the surface of the earth so that it ends up in a circular orbit
125156
Projectile/orbital motion over very long distance
155135
How fast does the electrostatic force travel?
13033
How fast would the Earth need to spin for us to feel weightless?
35121
Can a permanent Teleportation Circle be made on a moving vehicle?
80645
Time for two relativistic objects to meet
44164
Light Travels in straight line even in gravity
67327
Does this count as moving faster than light?
96604
How do I calculate how an object will move from one point to another?
152215
How gently could a comet/asteroid/meteorite “hit” Earth?
96657
The speed of light as it approaches a massive body
120948
Time taken for collision
48979
Work done by gravity on falling object does not seem to equal change in mechanical energy