Physics - October 2006

rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge H = 221 m below. If the plane is traveling horizontally with a speed of 255 km/hr (70.8 m/s), how far in advance of the recipients (horizontal distance) must the goods be dropped?

Suppose, instead, that the plane releases the supplies a horizontal distance of x = 401 m in advance of the mountain climbers. What vertical velocity (use the positive direction as upwards) should the supplies be given so that they arrive precisely at the climbers' position?

With what speed do the supplies land in the latter case?

I know the answer to the first part is 476 m, but how do you go about solving the last two questions?

2006-10-23 08:40:59 · 4 answers · asked by beautyqueenjustine 3

Who made the train or from where did the idea of the trian, get inspired from?

2006-10-23 08:36:14 · 1 answers · asked by aguywithproblems 1

a hydraulic motor rotates 28000 revolutions to do 9000000 joules of work. what is the average torque produced by the motor?

2006-10-23 08:32:53 · 2 answers · asked by Anonymous

That, is, something with more than 1 dimension. If so, couldn't I "push" one end of it and cause movement instantaneously at the other end? (Please don't *assert* the fact that information can't be transported instantaneously, obviously I'm looking or *implications* of that *theory*.)

2006-10-23 08:26:31 · 6 answers · asked by weary_banker 2

why do frictional forces reduce the efficiency of machines?

2006-10-23 08:23:37 · 3 answers · asked by Anonymous

Just a layperson but it seems there are two open questions that perhaps black holes could answer. I haven't read all the literature so this may be very naive: If black holes absorb everthing into a super dense singularity and now seem present at the center of galaxies, AND, if we don't yet understand the origin of the Big Bang, isn't it possible that these are connected? Couldn't Black Holes be the 'recycling' mechanism of matter from one universe to another?

2006-10-23 07:59:50 · 5 answers · asked by Anonymous

if a parachute exerts a force of 5000 newtons on an object that falls 500 meters is it positive or negative?

2006-10-23 07:56:05 · 3 answers · asked by Chris D 1

2006-10-23 07:41:00 · 4 answers · asked by vinithmathewsimon 1

Four railroad cars, each of mass 2.15 X10^4 kg, are coupled together and coasting along horizontal tracks at speed vi toward the south. A very strong but foolish movie actor riding on the second car uncouples the front car and gives it a big push, increasing its speed to 4.35 m/s south. The remaining three cars continue moving south, now at 2.40 m/s.

The inital speed of the cars is 2.89 m/s
How much work did the actor do in J?

2006-10-23 07:26:12 · 1 answers · asked by activegirl 1

Is it because of the current, or the voltage ?

2006-10-23 07:16:36 · 8 answers · asked by dragoneye_2005 1

2006-10-23 07:10:46 · 1 answers · asked by Javier 1

I am from germany and a fiew people say that it depends of living in the north or the south half of the earth. My swirl turns clockwise, does an australian swirl really turn unclockwise?
Sorry for the bad english.

2006-10-23 06:58:30 · 10 answers · asked by Anonymous

A ball of mass 0.120 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.600 m. What impulse was given to the ball by the floor?

2006-10-23 06:58:27 · 2 answers · asked by activegirl 1

2006-10-23 06:47:46 · 6 answers · asked by MN S 1

In the classical problem where a bullet is shot as a monkey as the monkey drops off a tree branch, does the monkey get hit, or does the bullet hit the monkey?
I know the answer is that the monkey gets shot, but can you explain it using physics terms?

2006-10-23 06:25:16 · 9 answers · asked by indrul1 3

2006-10-23 06:01:35 · 2 answers · asked by Anonymous

2006-10-23 06:00:50 · 2 answers · asked by Anonymous

The table shoes the total length of a spring when different loads are applied


Load in N Total length in cm
2 12
3 15


a. what extension is produced in the spring by a load of 1N?
b. calculate the origional length of the spring.

2006-10-23 05:58:05 · 2 answers · asked by Jenny 1

Plz give precise information as it is for exams!

2006-10-23 05:56:02 · 2 answers · asked by Anonymous

even if it is like the chance of 1 in 1000000000000000000000000000000000000000000 (you know what i mean) because my science teacher said everything can happemn but i cant get my head around it, he said every reaction has an oppositte however implaussible it sounds. is it possible in parrallel universes or something????

2006-10-23 05:07:05 · 11 answers · asked by podgeman 1

Where does it go?

2006-10-23 04:57:29 · 8 answers · asked by Anonymous

The question wheter to jump or not has been asked several times, it's clear that jumping won't help.

But many people suggested that the best way to survive in a falling elevator is to lie down flat on the ground. (to spread the force on a large surface).

I don't think that is reasonable!

I mean our legs and spine are made to protect the brain from shock. If we laid flat on the ground there would be no springing. you would hit the floor right with your head...
Have you ever jumped down a tree outstreched flat to spread the force? That's redicolous...

Some people here are giving advices that are far from reality...
What do you think?

2006-10-23 04:30:10 · 6 answers · asked by DrAnubis 4

could i survive by jumping up as high as i could just before the elevator hit the ground

2006-10-23 04:04:54 · 28 answers · asked by Stephen C 1

2006-10-23 04:03:43 · 10 answers · asked by wildbutterflychick 2

CONDITIONS OF THE UNIVERSE HAS CHANGE D OVER YEARS AND VELOCITY OF LIGHT STILL REMAINS 3*10^8M/S .ISN'T IT ABSURD?

2006-10-23 03:58:53 · 3 answers · asked by Anonymous

ma kid brother challenged me 2 this hypothetical question.

2006-10-23 03:21:26 · 16 answers · asked by Another face in the crowd 3

violet is the colour of less wavelength so it must scatter more than blue

2006-10-23 02:47:52 · 13 answers · asked by Neo 2

2006-10-23 01:51:15 · 13 answers · asked by mac 1

Assume that at time t=0, I am in a space ship starting at rest relative to the earth, and then I accelerate so that I continuously experience an acceleration equivalent to 1 earth gravity (about 9.81 Newtons).

At what time would I observe that I am travelling at 90 percent of the speed of light, relative to the earth? That is, how long after I started accelerating would I reach the speed of 0.9 c ?

2006-10-23 01:35:41 · 5 answers · asked by old c programmer 4

2006-10-23 01:08:26 · 4 answers · asked by gurna 1