An airport has runways only 194 m long. a small plane must reach a ground speed of 42 m/s before it can become airborne. Whast average acceleration mus the planes engines provide if it is to take off safely from it airport?
2007-09-03 10:36:45 · 4 answers · asked by Tony N 1 in Science & Mathematics ➔ Physics
Hmmmm
2007-09-03 11:04:46 · answer #1 · answered by ♫☆ Y!A Princessღ ♥ 3 · 0⤊ 0⤋
Assuming it would take-off at the end of the 194 m runway:
d=.5*a*t^2
and
v=a*t,
the t and the a will be the same
194=.5*a*t^2
42=a*t
substitute a*t =42 into the first equation
194=.5*42*t
t=2*194/42
then solve for a
j
2007-09-03 11:03:18 · answer #2 · answered by odu83 7 · 0⤊ 0⤋
the galaxies rotate at speeds inconsistent with their obvious mass is with the help of the fact we do see all of it. i'm relating it as being the theoretical dark count. There are very sturdy proofs that shows that dark count exist. One the is the inconsistent velocity of and obvious mass. dark count makes up approximately seventy 5% to 80% of the situation interior the Universe...
2016-12-16 10:29:49 · answer #3 · answered by Anonymous · 0⤊ 0⤋
It depend on your designated "margin of safety."
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2007-09-03 10:54:38 · answer #4 · answered by Anonymous · 0⤊ 0⤋