- #1
vysero
- 134
- 0
Ok so here is my problem:
Vf=Vi+at
I want to solve for t so:
(Vf-Vi)/a = t
right so now my problem starts how can this happen:
t = -Vf/a ?
The solution above comes from this site http://www.monmsci.net/~fasano/phys1/Chapter_2_10.pdf
scroll down to problem 2.31 and you will find what I am looking at, in this situation Vi = 0 so they disregarded it and somehow during that process (at least i believe it was during that process) they came up with:
t = -Vf/a
Please explain to me how that works, where the heck did the - sign come from??
Vf=Vi+at
I want to solve for t so:
(Vf-Vi)/a = t
right so now my problem starts how can this happen:
t = -Vf/a ?
The solution above comes from this site http://www.monmsci.net/~fasano/phys1/Chapter_2_10.pdf
scroll down to problem 2.31 and you will find what I am looking at, in this situation Vi = 0 so they disregarded it and somehow during that process (at least i believe it was during that process) they came up with:
t = -Vf/a
Please explain to me how that works, where the heck did the - sign come from??