Answer:
t= 7.88
Explanation:
Starting with F=ma.
The only force that is going to cause an acceleration is gravity (if we use the coordinate system I described).
F = ma
mgsin65 = ma
a = gsin65
Vf = Vi + at
0 = 35 m/s + (gsin65)t
t = 35/gsin65
multiply it by 2 to get whole time
t = 70/gsin65
t = 7.88 seconds.
