Jean, who likes physics experiments, dangles her watch from a thin piece of string while the jetliner she is in takes off from the airport. She notices that the string makes an angle of 24° with respect to the vertical while the aircraft accelerates for takeoff, which takes about 17 seconds. Estimate the takeoff speed of the aircraft.
=..............m/s
2007-09-23 08:30:41 · 3 answers · asked by Nikita 1 in Science & Mathematics ➔ Physics
Angle of the dangle theta is one angle of a right triangle formed by the string (hypotenuse), g (adjacent) and forward acceleration a (opposite). If the string length is L, the adjacent = Lcos(theta) and the opposite = Lsin(theta). Tan(theta) = a/g.
a = g/tan(theta)
Takeoff speed = at
2007-09-24 00:45:15 · answer #1 · answered by kirchwey 7 · 0⤊ 0⤋
all aircraft takeoff and land
around 150 knots.
there is an equation
weight x speed + lift
or somethin like that.
2007-09-23 15:36:54 · answer #2 · answered by rottentothecore 5 · 0⤊ 1⤋
Beats me! Don't mess around with Gene or her watch. I would rely on the instuments in the cockpit. Beside you never mention the direction and speed of the wind...makes a huge differance on the take off speed!! P.S. I deal in MPH!
2007-09-23 15:40:32 · answer #3 · answered by Anonymous · 0⤊ 1⤋