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+//Example 2.13

+x_0=0;//Position at the start of the ramp (m)

+x=200;//Position at the end of the ramp (m)

+v_0=10;//Initial velocity (m/s)

+a=2;//Acceleration (m/s^2)

+//Use the equation x=x_0+v_0*t+(1/2)*a*t^2 and rearrange to form a quadratic equation with t as the variable

+//(1/2)*a*t^2+v_0*t+(x_0-x)=0

+p=[((1/2)*a) (v_0) (x_0-x)];//Coefficients of the polynomial

+r=roots(p);//Roots of the polynomial)

+//The roots are complex-encoded due to rounding off errors. This may be checked by using

+//disp(isreal(r(1,1)))

+//disp(isreal(r(2,1)))

+//which result in 'T' if real and 'F' if an imaginary part is involved 

+if real(r(2,1))<0//Taking the real part

+    printf('Time taken to travel 200m up the ramp = %0.1f s',r(1,1))

+else

+    printf('Time taken to travel 200m up the ramp = %0.1f s',r(2,1))

+end

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest