1.OK.....what is the average velocity?
It covered 38 m in 0.2 sec
Uh-ohh....your question is unclear in its wording
in second # 5 did i cover 38 m or did it cover 38 m in 1/5 sec ????
I will go with the former (though that is not what I initially thought)
vf = vo + at = 38 = vo + (4)(5)
38 = vo + (20)
18m/s = vo
2. vf = vo + at = 7.5 = 8.5 + a(5)
-1 = a 5
- .2 = a OK so we know the accel is negative 0.2 (it is DEccelerating....slowing down)
vf = vo + at
8.5 = vo + (-0.2)(8)
8.5 = vo - 1.6
10.1 m/s = vo
(ALWAYS remember the UNITS)