# Physics

posted by
**Phil**
.

Units count.

Show all steps, not just the numerical substitutions. Show the equations you used.

No information is missing.

A person throws a ball upward into the air with an initial velocity of 15.0 m/s.

Calculate the following:

a.) how high it goes.

b.) how long the ball is in the air before it comes back to his hand.

c.) at what time(s) will the ball pass a point 8.00 m.

If you got multiples times, are both solutions valid? Why or why not?