physics

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?

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asked by Joe
  1. 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.

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    posted by Henry

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