. A ball is thrown vertically upward with a speed of 25.0 m/s. (a) How high does it rise? (b) How long does it take to reach its highest point? (c) How long does the ball take to hit the ground after it reaches its highest point? (d) What is its velocity when it returns to the level from which it started?

Question

.  A ball is thrown vertically upward with a speed of 25.0 m/s.  (a)  How high does it rise?  (b)  How long does it take to reach its highest point?  (c)  How long does the ball take to hit the ground after it reaches its highest point?  (d)  What is its velocity when it returns to the level from which it started?

anonymous · Answer

OK so what do we have here, some written question. 
What is the first thing you need to do to solve it?

anonymous · Answer

Translate it to maths

anonymous · Answer

How can you do that? Identify the unknown, what you know and what is given

anonymous · Answer

OK there is something that isnt given but you need to know. 
Why does the ball fall on the ground?