1. The problem statement, all variables and given/known data A 75.0 g ball with radius 10cm is dropped. I am supposed to write a program that plots y as a function of time, including acceleration due to gravity and drag force of D=0.25*area*velocity. 2. Relevant equations 3. The attempt at a solution Here's what I tried: >> n=21; >> t=zeros(1,n); >> v=zeros(1,n); >> y=zeros(1,n); >> h=0.5; >> g=-9.80; >> m=0.075; >> A=pi*0.10*0.10; >> for i = 2:n t(i)=(i-1)*h; fdrag=0.25*A*v*v; adrag=fdrag/mass; a=adrag+g; v(i)=v(i-1)+a*h; y(i)=y(i-1)+v(i-1)*h+0.5*a*h*h; end; ??? Error using ==> mtimes Inner matrix dimensions must agree. >> t is time, h is time increment, m is mass, a is total acceleration, A is area I don't understand the error that I am making. Could someone please help me?