Question

.

Answer 1

@dan815 @wio Can you guys Give this user the openstudy warm welcome and help him out. :)

Answer 2

@illianawer343 http://www.wikihow.com/Measure-Speed

That link gives you 3 different ways to find speed. I am usually only a history helper but since I recommended you here I will try to help. :) Let me know if you need further explanation.

Answer 3

@ganeshie8 please take this one, thanks

Answer 4

since the the throw is horizontal ======> acceleration an ax=0

Answer 5

i

Answer 6

assume no one catch the ball
first find the time

Answer 7

0=Y+Vy*t-1/2*a*t^2
1.8=1/2*gravity *t^2

Answer 8

Vy=0 since the throw is horizontal

Answer 9

t=sqrt(1.8*2/9.81)

Answer 10

now slove for V
V=18/t

Answer 11

yeah

Answer 12

Yup. Approximately. :P