An object is thrown vertically upward at 35 m/s. The velocity of the object 5.0 seconds later is:
The Attempt at a Solution
vf=35-(9.8)(5)=14 m/s down
I know this is the correct answer, but I'm confused about why you choose the equation above. The first time I worked this problem I tried to use vf=vo+gt. Could someone please explain to me why this would be wrong? Is it maybe because the acceleration is negative?