2006-11-13 23:59:59 · 7 answers · asked by Khaleck 1 in Science & Mathematics ➔ Physics
Hi!
In a very simplified model it would take about 2.833 seconds. In reality it takes a little longer than that because the air exerts some drag, however he falls. The time depends still on it's weight because the drag depends on the air and shape, while G=m*g depends on it's weight, so the mass remains as a variable. Very light objects such as balloons fall very slow (as you probably know).
100km/h=27.7 m/sec. time*acceleration= (desired speed) When there is no initial speed. Thus time= v/accel=2.83sec
2006-11-14 00:18:33 · answer #1 · answered by viktorpopescu 2 · 0⤊ 0⤋
Even assuming there is air resistance, and there is. Rina's answer is still good because the friction forces don't amount to much at the speeds you are talking about. They do start to, but at around double that speed the friction force counters the gravitational pull and you reach what is called terminal velocity. Of course, it isn't the fall that kills you, it's the sudden stop at the ground.
2006-11-14 08:18:24 · answer #2 · answered by SteveA8 6 · 0⤊ 0⤋
assumed there's no resistance from the air.
acceleration = g = 9.8 m/s2 = 0.0098 km/s2
free fall ---> v0 = 0 m/s
v = 100 km/h = 0.0278
v = v0 + a x t
0.0278 = 0 + 0.0098 x t
t = 0.0278/0.0098 = 2.8345 second
t = 100/127008 =
2006-11-14 08:12:52 · answer #3 · answered by Rina 2 · 0⤊ 0⤋
v = u + at
100km/h = 100000/3600 = 27 meters/sec at the rate of g is approx 3 seconds
2006-11-14 08:04:42 · answer #4 · answered by ustaadji 2 · 0⤊ 0⤋
approximately it will take about between 5000 and 6000 feet from the ground. and if you convert that to miles it's about 50 miles!
2006-11-14 08:07:54 · answer #5 · answered by Reality-blver 1 · 0⤊ 0⤋
there is no 'average human'
2006-11-14 08:08:28 · answer #6 · answered by Anonymous · 0⤊ 0⤋
are you tryin to bamboozle me mister?
2006-11-14 08:02:55 · answer #7 · answered by Anonymous · 0⤊ 0⤋