Francesca, who likes physics experiments, dangles her watch from a thin piece of string while the jetliner she is in takes off from dulles airport. she notices that the string makes an angle of 25° with respect to the vertical as the aircraft accelerates for takeoff, which takes about 18s. estimate the takeoff speed of the aircraft.
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Francesca, who likes physics experiments, dangles her watch from a thin piece of string while the je...
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