# High School Physics Problems

wittywonka
Science 26 Feb '08 04:29
1. wittywonka
Chocolate Expert
26 Feb '08 04:29
An airplane weighing 175,000 kilograms begins accelerating at 2.2 meters per second per second at an angle 12 degrees above the horizon. How long will it take before the airplane takes off?
2. 26 Feb '08 04:45
Originally posted by wittywonka
An airplane weighing 175,000 kilograms begins accelerating at 2.2 meters per second per second at an angle 12 degrees above the horizon. How long will it take before the airplane takes off?
When the plane reaches rotation speed and the pilot pulls up.

ðŸ™‚

Aren't you supposed to be doing your own homework kiddo?
3. Mexico
Quis custodiet
26 Feb '08 04:502 edits
Originally posted by mlprior
When the plane reaches rotation speed and the pilot pulls up.

ðŸ™‚

Aren't you supposed to be doing your own homework kiddo?
He has a point, anyone who has studied physics could probably answer this but then you wouldn't learn....

4. 26 Feb '08 05:07
Originally posted by wittywonka
An airplane weighing 175,000 kilograms begins accelerating at 2.2 meters per second per second at an angle 12 degrees above the horizon. How long will it take before the airplane takes off?
Do you have an answer yet?

Break the lift into horizontal and vertical vectors.

I have an answer but I'm gonna wait for yours first!

ðŸ˜€
5. 26 Feb '08 05:15
Originally posted by wittywonka
An airplane weighing 175,000 kilograms begins accelerating at 2.2 meters per second per second at an angle 12 degrees above the horizon. How long will it take before the airplane takes off?
How long is the wing span?
6. 26 Feb '08 05:18
Originally posted by cashthetrash
How long is the wing span?
Does it have a G1000?

What is the useable fuel capacity?

Where is this plane hangered?

Are the keys in the ignition?
7. Mexico
Quis custodiet
26 Feb '08 05:22
Originally posted by mlprior
Does it have a G1000?

What is the useable fuel capacity?

Where is this plane hangered?

Are the keys in the ignition?
More Importantly Is the pilot a loaf of bread, cause if thats the case then the plane aint going anywhere
8. 26 Feb '08 05:321 edit
Originally posted by Mexico
More Importantly Is the pilot a loaf of bread, cause if thats the case then the plane aint going anywhere
Good point!

I will eat the bread and a quarter pounder with cheese, thus increasing the overall mass by .3 pounds.

Looks like Witty Wonka has taken off, I never did like that movie.

OK, the answer I got was 21.4 seconds...I'm not sure I did that correct though.

Good night!
9. Mexico
Quis custodiet
26 Feb '08 05:36
Originally posted by mlprior
Good point!

I will eat the bread and a quarter pounder with cheese, thus increasing the overall mass by .3 pounds.
If your already near the loaf of bread you already in the plane therefore its a closed system, and not mass is gained..... Unless of course your hiding a revolutionary piece of equipment in your stomach which can convert energy into mass using bread as a catalyst..... Are you? I demand that you share this with the scientific community at large...
10. rhb
Ginger Scum
26 Feb '08 09:20
Originally posted by wittywonka
An airplane weighing 175,000 kilograms begins accelerating at 2.2 meters per second per second at an angle 12 degrees above the horizon. How long will it take before the airplane takes off?
Take it to "Posers & Puzzles", Spanky!

edit - on a serious note, surely this belongs there. Have these new fora(forums?) blurred the boundaries?
11. wittywonka
Chocolate Expert
26 Feb '08 11:10
Ha, well, I confess that I have had physics problems like this one, but this isn't specifically one of my homework problems. Sorry for that confusion.

As proof, I'll solve it (at least I hope).

Because the airplane is accelerating at 2.2 m/s^2 at an angle of 12 degrees, we start by finding the y-axis component of that acceleration, which we find to be approximately 0.46 m/s^2 (sin12*2.2). From here, we find the force of this acceleration on the airplane, approximately 80,500 N in the upward direction (0.46*175,000). Now, we find the force of gravity acting on the airplane, 1,716,750 N in the downward direction (175,000*9.81). Finally, we divide these forces to find the amount of time it takes for the airplane's force to overcome the force of gravity, approximately 21.3 seconds (1,716,750/80,500).

Feel free to correct me if I am indeed mistaken.
12. 26 Feb '08 12:02
Originally posted by wittywonka
Ha, well, I confess that I have had physics problems like this one, but this isn't specifically one of my homework problems. Sorry for that confusion.

As proof, I'll solve it (at least I hope).

Because the airplane is accelerating at 2.2 m/s^2 at an angle of 12 degrees, we start by finding the y-axis component of that acceleration, which we ...[text shortened]... y [b]21.3 seconds
(1,716,750/80,500).

Feel free to correct me if I am indeed mistaken.[/b]
Is it a ballistic aeroplane or is it one that acts aerodynamically?
If it is a ballistic one you might be right, but then it is not a normal aeroplane.
13. 27 Feb '08 01:202 edits
Originally posted by wittywonka
An airplane weighing 175,000 kilograms begins accelerating at 2.2 meters per second per second at an angle 12 degrees above the horizon. How long will it take before the airplane takes off?
Too hard for me. ðŸ˜ž
14. 27 Feb '08 01:27
Originally posted by wittywonka
Ha, well, I confess that I have had physics problems like this one, but this isn't specifically one of my homework problems. Sorry for that confusion.

As proof, I'll solve it (at least I hope).

Because the airplane is accelerating at 2.2 m/s^2 at an angle of 12 degrees, we start by finding the y-axis component of that acceleration, which we ...[text shortened]... y [b]21.3 seconds
(1,716,750/80,500).

Feel free to correct me if I am indeed mistaken.[/b]
wrong.
the plane will never take off, unless you consider the lift caused in the wings (proportional to the horizontal speed). But that's not included in the problem.
The plane in the problem will always have the same vertical and horizontal acceleration, and will never overcome gravity.
15. Mexico
Quis custodiet
27 Feb '08 01:30