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[matlab] I just want to plot a function that describes position as a function of time 
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#1
Oct210, 07:36 PM

P: 129

It's an object that's falling from rest. The equation takes into account linear friction. in any case, this is is my code or program of whatever it is called:
m=80;%Mass of ignorance g=9.8;%Gravity beta=1.6*10^4;%Given coefficient for air at STP D=.4;%Diameter of Palin, assuming she's a spherical object b=beta*D;%Coefficient of linear friction t=0:.2:60; x=(m./b)*(g*t + e^(b*t./m)); plot(t,x) grid on xlabel('time','FontSize',16) ylabel('Position of Sarah Below Helicopter','FontSize',16) I get this error: Error in ==> HW13myprogram at 10 x=(m./b)*(g*t + e^(b*t./m)); What am I doing wrong? 


#2
Oct310, 12:24 PM

Sci Advisor
PF Gold
P: 1,474

replace your equation with
x=(m/b)*(g*t + e.^(b*t/m)); 


#3
Oct310, 01:27 PM

P: 15

It worked fine for me with:
x=(m./b)*(g*t + exp(b*t./m)); 


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