new user question

[jason lake]

Hi there,

I am working working with displacement data and using dplot to differentiate this data to generate velocity, smooth and then differentiate to generate acceleration data.

My question is, is there a way to calculate the objects force from the acceleration curve using the following formula: ((g [9.81]*mass [say 20kg])+(mass[say 20kg]*acceleration)).

If this were possible the velocity curve could then be multiplied by the force data to obtain mechanical power output.

Up until now I have been copying the data over to excel to perform these calculations but was wondering if there was perhaps a quicker way.

Many thanks,

Jason.

[DPlotAdmin]

Jason,
You can perform whatever manipulations you want to on your data within DPlot using Edit>Operate on Y. If you want to preserve the curve you'll be operating on then make a copy of it first: Edit>Copy>Data values, Edit>Paste.

[jason lake]

Thank you for your swift response.

That works perfectly in answering my first questioning.

However, I'm a bit stuck with regard to my second... can I multiply one y curve by another.

From your answer it seems that I can but I'm having trouble figuring it out.

Many thanks for your help,

Jason.

[DPlotAdmin]

Yes, use Generate>Y=f(X,Y1,Y2,...)

For example to multiple the amplitudes of the 2nd curve by the amplitudes of the 3rd curve, use Y=Y2*Y3

[jason lake]

Hi David...

that's excellent, worked perfectly.

Thank you very much for your help.

Kind regards, Jason.