English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

"It is an overcast day and about to rain. There is a propeller-powered aeroplane that is flying just below the clouds directly above you. As you look up, you see a military package drop from the aircraft.

How far do you have to walk to retrieve the package?"



Ok, my question is just like this, please don't ask me why. This is like some physics and mind question. Please help me, gonna do presentation later. :(

2007-04-22 18:09:50 · 5 answers · asked by thenightmarebeforenewyear 1 in Science & Mathematics Other - Science

I need to find the estimation of the travel value as well, argh........ :(

2007-04-22 18:23:14 · update #1

5 answers

package travels down along a parabola

assume the drop begins from a 10 m high with no air resistance; since g=10m/s^2 (appr.) this means that in 1.41 seconds the package will reach the ground. This follows from

h = 1/2 g t^2

t = sqrt(2) =1.41 s

Assume the plane's speed is 800 mph = 355 m/s then the horizontal component of the package's path is L=355*1.41=500m

So you have to walk about half a km.

2007-04-22 19:07:26 · answer #1 · answered by Leo P 2 · 0 0

Oh dear, this seems to be a classical problem for pilot trainees. I thought it was covered back then in flight academy... Figured the answer was something like some distance or something, which actually was basic enough. Amazing thing was that the flight cadets could work it out.

Your aeroplane has to be of some sort of possible speed for the military drop. For a basic cargo flight, a drop speed would be about 120 kmph. You can take the gravitational speed as 10m/s squared. Because you should also consider the windiness of the climate which is going to rain, you should apply a "offset" component into the original Newton's second equation for movement, and s=ut+(1/2at*t)/(2gt).
You use g to be the gravitational pull acting on wind, which is taken as 10 since measurements of g force on wind is approx. same as on masses of objects. Make s as a drop level for the cargo plane as 500m. (Any higher would break the whole crate even with chutes!) Solve for t, and multiple the found answer for t by 120kmph... thats it!

2007-04-23 22:32:38 · answer #2 · answered by Anonymous · 0 0

Two steps to dodge the package and two steps to go back to where you were to retrieve the package dropped from the helicopter.

Without the elevation of the "aeroplane" and without its effective ground speed, and a whthout wind speed and direction, there is no answer unless the "aeroplane" was stationary not far above you. A helicopter would be the most likely. A vertical dive bomber another means, but disasterous.
I'll stick with the chopper.

2007-04-22 18:24:49 · answer #3 · answered by Bomba 7 · 0 0

a million) common internet analyze will answer that, different than the glaring. 2) Drops from flight would desire to be completed at a particularly low speed. Propeller-pushed airplane are often greater helpful at that than a jet airplane. That being stated, jet airplane have been designed to drop programs as nicely - they artwork of their very own way, we basically see greater prop. pushed airplane in this place. 3) That relies upon on the airplane and could variety a great deal. the internet is a helpful source for analyze. do no longer recommendations assisting out yet you gotta carry your end of the burden too! solid luck

2016-12-16 13:07:39 · answer #4 · answered by ? 4 · 0 0

hey.. lemmie guess. You are from Singapore. and you attend a polytechnic. PROBABLY REPUBLIC POLY RIGHT?!!!! haha.. i'm having the same question today dude! i guess you're helping my team indirectly here... this is so good. =) i wonder wad class u are in...

2007-04-25 15:58:46 · answer #5 · answered by yweouch 3 · 0 0

fedest.com, questions and answers