- #1

balancedlamp

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Given that after 1 second the ball traveled 10 ft in the air, I had the initial velocity as 10 ft/s. At the apex, the velocity will be 0 ft/s. Since change in position is not given I used the equation Vf = Vi + at. My thought was to find the time this way then multiply by two. Using a=-32.2 ft/s/s, I got t=5/8 s at the end of it all, which doesn't make any sense. I acknowledge that I left out the part about it being 20ft in the air after 2 seconds, but I thought that would erroneous considering we know the initial velocity and the value of a. What am I doing wrong?