What angle should a long jumper jump at?

[mahtab]

An athelite wireless gaurate a long jump,at what angle he should jump?

 

[berkeman]

You must show us your own work before we can offer tutorial assistance. I believe you are asking what the optimum takeoff angle is for a long jumper. If so, what would be your initial thoughts on the answer, and then how would you go about trying to prove it?