Hello my name Mrs. B.Keundra,Im asking this question b/c all of my students failed my test. Can you pass?????

Question

Te following numbers apply to the questions below:
10, 20, 30, 40, and 50

projectile
mass =
(kilograms)

Maximum
Range =
Distance
(meters)


Maximum
Elevation =
(Height)
Meters

Final
Velocity =
Meters/sec

Total
Time =
seconds

Answer 1

Where are the directions?????

Answer 2

I don't think there is a qualifying answer that uses those numbers. Here's why.

First, since you don't give the shape of the projectile, we can assume that air resistance is being ignored. Therefore the mass of the projectile can also be ignored (so whatever number is left over, we would just use that for the mass).

Also, since there is no air resistance,
Final Velocity = Initial Velocity. So let's just call it V.

The velocity, V, is composed of a horizontal and a vertical component ... lets call them Vx and Vy.

And from this we know that V, Vx, and Vy form the sides of a right triangle ... so V^2 = Vx^2 + Vy^2.

We also know that the horizontal velocity Vx does not change (since we're assuming no air resistance). So the total distance X that it travels is simply X = Vx * T (where T is the time).

That's enough to tell me that no solutions can be made with those nice round numbers.

Assume the right triangle Vx-Vy-V is a 3-4-5 right triangle (to give us round numbers). Let's plug in different values of V from the list 10, 20, 30, 40, 50

If V is 50, then Vx is 30 ... and there are no solutions for X = 30 * T, where T and X are among 10, 20, 30, 40, 50.

If V is 10, then Vx = 6. And again you can't find a solution for X = 6 * T, where T and X are among 10, 20, 30, 40, 50. (Vx could also be 8, but that doesn't help matters.)

All other values for V (20, 30, 40) also produce no possible solutions for T and X among (10, 20, 30, 40, 50).

It's also pretty easy to see that a 5-12-13 triangle, or a 7-24-25, or an 8-15-17 would be even worse.

So I'm thinking there's no solution. If we're all wrong, please post it.

Answer 3

Your students failed because this is a very difficult question, compounded by the fact that it is poorly worded. If it weren't for the fact that it's almost midnight where I am, I'd try to figure it out to see if it is even possible. I can tell you right off that mass doesn't matter, so whatever number is leftover at the end must be the mass. Also, are you trying to find the maximum range for a given velocity regardless of the angle, and then the maximum elevation regardless of the angle? Because those would be two different angles (as I'm sure you know). Are we assuming that the projectile was launched and landed from the same height? These are questions that pop into my head without even putting pencil to paper.

This question might be a fun challenge question to give in class, or maybe for extra credit on homework, but not for an exam.

Answer 4

This question is flawed. If I'm only allowed to use 10-50, and we're calculating velocity and distance, even with a maximum of 50 for range/distance, and a velocity of 10 meters per second, I'd end up at max distance in 5 seconds.

Answer 5

Teacher, even you failed the spelling test. The word supposed to be "the" no "te". Now I see why your students failed! I have a second look at your question. You're a wicked teacher! No instructions. Are you this curel to your students? What grade are you teaching? Just curious. So you really gives out your true identity.............not! I don't believe you!

Answer 6

nicely over 10 what?.... training? finding out would desire to be rapidly forward. Any instructor that try a pupil to make certain in the event that they'd desire to be promoted would desire to be kicked out of the school. finding out would desire to have the pupil do each and every thing it is needed for the rank that they are being examined for. the pupil would desire to be able to do each and every thing on the point equivalent to the rank they're finding out for. you may assume a black belt to do some thing that a beginner does plenty extra effective. the only question is can the pupil do each and every thing on the point he would desire to be performing at? and would he do it without HESITATION. regrettably many try finally end up being scholars blundering by some strikes that they can't do nicely and don't understand. walking by some thing and having the flexibility to safeguard your self suddenly are tow completely countless issues. If all of us is in a school that enables pupil to purpose that for sure rather walk by issues, would desire to think of of finding for someplace else to coach. ...

Answer 7

I have always disliked math. I manage to pass, but it was difficult for me. For what you have above, It overwhelms me and I would skip over it any other time. It is difficult to make out what your instructions are.

By the way, are you really a teacher, or just a student that failed the confusing test above? I read other questions that you had and you were asking for help for your homework and said one was due at 12:00???????????????????????????/

Answer 8

The only one I am sure of is final velocity, aka gravitational acceleration, 10 Meters per second, per second

Answer 9

I don't know why I'm even trying to do this,but I will. Range=50, Elevation=40 Mass=30 Velocity=20 Time=10 I gave it my best..................................................LATER......

Answer 10

I guess that the students in your class are as smart as I am! I would fail your question also. I'm 57 and would not know the answer....what grade do you teach???

Have a nice day!

Answer 11

I'm 15. Its the weekend. School sucks. No way.