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avatar+151 

A researcher observes and records the height of a weight moving up and down on the end of a spring. At the beginning of the observation the weight was at its highest point. From its resting position, it takes 20 seconds for the weight to reach its highest position, fall to its lowest position, and return to its resting position. The difference between the lowest and the highest points is 6 in. Assume the resting position is at y = 0.

 

Use the sine tool to graph the function. The first point must be on the midline and the second point must be a maximum or minimum value on the graph closest to the first point.

 

Is this correct?

 

off-topic
 Jan 29, 2020
 #1
avatar+20217 
+2

Short answer :   No...it is not correct.

 

at t= 0 it should be at it's highest point

period is supposed to be 20     you have 16

difference between highest and lowest point is supposed to be 6      yours is much more...

   also, you do not have midline resting position at y=0

 

try to rework it and come back......

 Jan 29, 2020
edited by ElectricPavlov  Jan 29, 2020
 #3
avatar+151 
+1

Better or worse?

 

PeerlessCucumber  Jan 29, 2020
 #2
avatar+20217 
+2

If you want to peek at what the wave should look like see here:

 

https://www.desmos.com/calculator/dt2d8lubmv

 Jan 29, 2020
 #4
avatar+151 
0

Oh, oops. One moment then. 

PeerlessCucumber  Jan 29, 2020
 #5
avatar+151 
0

Would it be appropriate to put the points here then?

 

PeerlessCucumber  Jan 29, 2020
 #6
avatar+20217 
+1

yes ...points are ok   first is at midline     second is at minimum

  do you understand HOW to plot the graph given the information in the Q?

ElectricPavlov  Jan 29, 2020
edited by ElectricPavlov  Jan 29, 2020
 #7
avatar+20217 
+2

3 sin (pi/10  (x+5) )

 

3   is the amplitude     from midline the graph goes up 3   and down 3

 

+5    shifts the graph right ....so you can have high point at t= 0

 

pi/10   changes period from 2pi    to  20           2 pi / x  = 20        x = pi/10   

ElectricPavlov  Jan 29, 2020
 #8
avatar+151 
0

Kind of, I'm still really shaky on a lot of these concepts, even at their basics, but my teacher keeps rushing us through so many things its hard to keep up alongside other schoolwork. 

PeerlessCucumber  Jan 29, 2020
 #9
avatar+107466 
0

It is very hard for you PC becasue you are missing so many of the basic concepts.

Put most of your effort into basic concepts and if you are lucky the other will clink into place afterwards.

Melody  Jan 29, 2020
 #10
avatar+20217 
0

Just play around with the graphing tool to see what the parameters do when you change them'

 

a sin (x+b)  + c           a    amplitude change       b    shift L or R       c    shift up or down     etc

ElectricPavlov  Jan 29, 2020
 #11
avatar+151 
+1

laugh Trying my best.

PeerlessCucumber  Jan 29, 2020

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