Dem0n's Homework (Topic)

I have to ask, what are your plans as far as future mathematics go? Are you even the slightest bit interested in pursuing a field that's math-centric? If so, you're going to have to overcome your teacher's ineptitude through self-study, it'll require you to take the time to go through the course material yourself until you understand the mechanics of it. If not, then just get the answers to what you're doing and forget about it.

ᕕ( ᐛ )ᕗ

Quote from name:Azrael.Wrath

I have to ask, what are your plans as far as future mathematics go? Are you even the slightest bit interested in pursuing a field that's math-centric? If so, you're going to have to overcome your teacher's ineptitude through self-study, it'll require you to take the time to go through the course material yourself until you understand the mechanics of it. If not, then just get the answers to what you're doing and forget about it.

computer sciences/engineering :hurr:

I need help again. ;\ I have a problem here that's asking me to figure out how far a car goes before it stops if its initial velocity is 45 km/h and its acceleration is -0.5m/s. I converted the 45 km/h to 12.5 m/s, but I don't know what to do from there. What formula would I use for something like this? The problem also asks me to "calculate the distance it travels during the first and fifth seconds" (it takes 25 s for the car to stop), but I don't understand what that's asking. Is that asking me to figure out how far it travels between 1 and 5 seconds, or is it asking me to see how far the car travels on that exact first and fifth seconds. The textbook says the answer for that is 12 m and 10 m, so I'm guessing it's the latter, but I don't get it.

Do you have any idea at all how time, position, velocity, and acceleration are related? If you do, these problems should be extremely easy.

If you just look at the units, they tell you the answers.
Time: s
Position: m
Velocity: m/s
Acceleration: m/s/s (I notice you wrote that the acceleration is -0.5m/s, which kind of tipped me off that you don't know these.)

None.

I just told you how to solve this in the god damn shoutbox, but you ignore it and ask here? Sounds to me like you're just a lazy shit who doesn't want to learn this stuff.

Oh well, at least you have 12.5m/s right. That's a good start.

Okay, so if you want to find the distance, you're going to have to know how long the car travels for. Find an equation that links time, velocity, and acceleration.

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None.

Gonna leave this here for ya.

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Post has been edited 2 time(s), last time on Sep 30 2011, 1:17 am by Observer12425.

None.

Relatively ancient and inactive

SO VERY CUTE~!!! :crazy:

None.

Back* from the grave

Quote from

Observer12425

Gonna leave this here for ya.

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Thus we answer the question without providing any actual understanding. Anyone can plug n chug questions to get answers. Physics is largely about understanding the problem at hand, which as FE noted, he clearly does not.

Quote from

FatalException

Do you have any idea at all how time, position, velocity, and acceleration are related? If you do, these problems should be extremely easy.

If you just look at the units, they tell you the answers.
Time: s
Position: m
Velocity: m/s
Acceleration: m/s/s (I notice you wrote that the acceleration is -0.5m/s, which kind of tipped me off that you don't know these.)

Couldn't have said it better myself. I actually missed the m/s error because I simply didn't read the units, I assumed that he knew enough to at least get acceleration right.

Quote from name:Dem0nS1ayer

Quote from name:Azrael.Wrath

I have to ask, what are your plans as far as future mathematics go? Are you even the slightest bit interested in pursuing a field that's math-centric? If so, you're going to have to overcome your teacher's ineptitude through self-study, it'll require you to take the time to go through the course material yourself until you understand the mechanics of it. If not, then just get the answers to what you're doing and forget about it.

computer sciences/engineering :hurr:

I need help again. ;\ I have a problem here that's asking me to figure out how far a car goes before it stops if its initial velocity is 45 km/h and its acceleration is -0.5m/s. I converted the 45 km/h to 12.5 m/s, but I don't know what to do from there. What formula would I use for something like this? The problem also asks me to "calculate the distance it travels during the first and fifth seconds" (it takes 25 s for the car to stop), but I don't understand what that's asking. Is that asking me to figure out how far it travels between 1 and 5 seconds, or is it asking me to see how far the car travels on that exact first and fifth seconds. The textbook says the answer for that is 12 m and 10 m, so I'm guessing it's the latter, but I don't get it.

It's asking how far it travels if you set the time equal to 1 and 5. I doubt the answer was really in meters, because that is what the velocity should be at those exact times. Then again, they may be asking how far it travels in one second with a constant velocity as determined by 12.5 m/s at those exact points in time, as that works for both units and magnitude.

Explanation. HINT: 1/x = x^(-1)

I only have this collapsabox here because Observer provided essentially no explanation with his equation, while you desperately need to understand unit conversion, as well as problem conception. This next sentence is set aside for extra emphasis, as if it needs it.

It's worse to have an equation with no understanding of how to apply it than knowing how to apply an equation you don't have.

Demon, if you need help with this, you may want to reconsider your career options. I know it seems weird, but you will likely need some Physics as it covers electricity and circuitry.

Post has been edited 1 time(s), last time on Sep 30 2011, 3:55 am by poison_us.

Still Napping

I remember in my physics class we had an equation sheet with all of our equations on it.

You don't need a sheet of Newtonian physics equations. If you understand them, you can write them from understanding. Reminds me of some kids I was helping with a simple velocity, time, and distance problem. They kept trying to plug it into an acceleration problem because their teacher taught them to list known variables and use those (and since gravity's acceleration was known...).

I've already voiced my opinions on the matter, but if you kids want to just hand him the answer, you're not helping.

None.

Back* from the grave

I was trying to explain the reasoning behind the equations, not give him the answer with no reasoning. Yes, I'm unhappy with you, Observer.