Newton's laws of motion
1. An object will remain at rest, or continue to move at a constant velocity, unless an external net force acts upon it.
2. Net force on an object is equal to its rate change of momentum.
3. For every action there is an equal and opposite reaction.
Now with that defined, how is it that on Star trek and Star wars when the spaceships come out of hyper-space traveling at a speed greater than 600,000 miles a second and come to a complete stop like they have a police road block in front of them and yet everything in the space ship does not go through the windsheild or hull of the craft? Either it has one helluva gravity generator on board or Newton is smoking crack. What do you think?