course Mth 151
I submitted assi 4 last night but I still don't see it on my access page and it's not saved in the program either. What could have happen to it?
It's posted. Most days I collect files submitted through late afternoon or early evening and respond to them, posting them around midnight (sometimes before, sometimes after). Files submitted after I collect the information are collected and posted the following day.
Also, I need some clarification about amplitude and period.I have looked through the book and notes and can't really find what I'm looking for. Obviously I can graph any of the equations on a calculator and see what they are supposed to look like, but this hasn't answered my questions either.
About amplitude: I haven't found a specific definition, but if it is the distance from the x-axis, haven't we always been taught that distance is never negative ?
That was defined for a pendulum on one of the first video clips you viewed. However a slightly more extensive definition:
For periodic oscillatory motion the equilibrium point is the 'center' point of the motion, and the amplitude is the maximum distance of the object from its equilibrium position.
About period: If it is a cycle, how can it be negative ?
the period is the time required to complete a cycle, and can't be negative
How do you differentiate pos/neg. on a graph ?
I noticed that some of the answers are given as +/- but none of the graphs in the book are like this.
Any data point is plus or minus some uncertainty, which has a way of 'spreading out' your data points.
In a different context, when you solve an equation of the form x^2 = c you get x = +- sqrt(c), meaning that x can be either sqrt(c) or - sqrt(c) (e.g., x^2 = 25 is solved by x = 5 or x = -5).
Can you be more specific about where you're seeing this?
I worked out all the equations and got them right, and did the graphs, and here are my observations, but I'm still not sure about the pos/neg.
+A and +P turns up at origin(moving left to right
-A and +p turns down at origin
+A and -P turns down at origin
-A and -P turns up at origin
This is the kind of thing that tripped me up during the last class I took. I could do my work but didn't understand things like this and then it would be on the test.
I'm not sure what graph you mean. It's an important question and I'm glad to answer, but we need to clarify that first.
You can graph period vs. length of a pendulum.
For any harmonic oscillator you can graph velocity vs. position, velocity vs. clock time, position vs. clock time, etc..
Can you be more specific about the graph, the situation, the question or instruction involved here?