the position of an object before time=0?
2007-02-15 11:43:48 · 3 answers · asked by bekki s 1 in Science & Mathematics ➔ Physics
By definition in Phisics and any other subject, there are no negative time.
Any calculation must use time with positive values and any result with negative time is wrong.
2007-02-15 11:51:49 · answer #1 · answered by Marcel GL 3 · 0⤊ 1⤋
To know the position of an object before time is zero does not even make sense. You cannot go back in time to see where an object is located. If you need to know the former location, you need to start time at that location.
If the object is in motion it must have a velocity. Velocity is displacement / time. Therefore there must be recorded time for a moving object. You may have to adjust your own time scale to account for the previous motion before you started timing, but there cannot be negative time.
2007-02-15 19:54:21 · answer #2 · answered by physandchemteach 7 · 0⤊ 0⤋
It does in Newton's laws of motion. I think most physical laws work just as well in both directions of time.
2007-02-15 19:52:07 · answer #3 · answered by Anonymous · 0⤊ 1⤋