# Projectile motion of a volleyball

1. Jan 14, 2010

### majormuss

1. The problem statement, all variables and given/known data

A volleyball hit into the air has an initial speed of 10. meters per second. Which vector best represents the
angle above the horizontal that the ball should be hit to remain in the air for the greatest amount of time?
1)90 degree above horizontal 2) 60 above horizontal 3) 45 degree above horizontal 4) 30 degree above horizontal
2. Relevant equations

3. The attempt at a solution
i chose '3'... which is it? and why?
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Jan 14, 2010

### Matterwave

Be careful what the question asks. The question is which one will allow the ball to remain in the air the longest, not travel the farthest distance.

Use your intuition. For problems like this, that's all you need. If I throw a ball, either horizontal, at an angle, or straight up, which one will remain in the air the longest?