a javelin thrower wished to obtain a record of throwing 100 m on a flat level ground. if he hurls the javelin at 45 degrees from the horizontal, what initial speed must the javelin have?
d = Vo^2*sin(2A)/g = 100 m.
Vo^2*sin(90)/9.8 = 100
0.102Vo^2 = 100
Vo^2 = 980
Vo = 31.3 m/s.