An archer tries to hit a target that is 20m away from him. He can release the arrow at 25m/s. Neglecting air resistance, estimate the angle which the archer should aim to compensate the fall of the arrow due to gravity.

Please answer clearly and explain the solution clearly and easy to understand. Thanks!
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Question

An archer tries to hit a target that is 20m away from him. He can release the arrow at 25m/s. Neglecting air resistance, estimate the angle which the archer should aim to compensate the fall of the arrow due to gravity.

Please answer clearly and explain the solution clearly and easy to understand. Thanks!
(guaranteed medal for a good answer)

amistre64 · Answer

|dw:1315054335465:dw|

moongazer · Answer

is it 9.02?

amistre64 · Answer

dunno, lets see :)  there should be at most, 2 degrees depending on the conditions of the problem.  If its not 45, then it will be one angle above and another below that works ..

amistre64 · Answer

we need to break the initial velocity vector into 2 parts; an up part and an out part; the up part fights gravity while the out part carries it the distance.

amistre64 · Answer

the up part should be:|dw:1315142678453:dw|