A rocket is launched at an angle of 70° above the horizontal from rest. It moves for 30s along this path with an acceleration of 45m/s2. After this time, the engines fail and the rocket proceeds to move as a free body.

Aflute player hears four beats per second when she compares her note to a 523 hz tuning fork (the note c). she can match the frequency of the tuning fork by pulling out the “tuning join” to lengthen her flute slightly. what was her initial frequency?