- #1
devanlevin
given
[tex]\vec{R}[/tex]=(30t-t[tex]^{3}[/tex])[tex]\hat{x}[/tex]+(22t-4t[tex]^{2}[/tex])[tex]\hat{y}[/tex]
find, for time t=2s
1)the acceleration (a)
2)the angular acceleration([tex]\alpha[/tex])
3)the radius of the curve of the path it takes, at t=2s
as far as i can see, i can integrate [tex]\vec{R}[/tex] twice to get the acceleration, but i need the radius to find out ([tex]\alpha[/tex]),...
the only thing i could think of to find the radius is using the equation of a circle
(X-Xo)[tex]^{2}[/tex]+(Y-Yo)[tex]^{2}[/tex]=r[tex]^{2}[/tex]
then plugging in the values of [tex]\vec{R}[/tex](t=2s) in the X and Y, problem is i don't know the Xo, Yo (centre point) of the circle. thought maybe to plug in X,Y at t=0 for Xo Yo but that just seems wrong.
any ideas
[tex]\vec{R}[/tex]=(30t-t[tex]^{3}[/tex])[tex]\hat{x}[/tex]+(22t-4t[tex]^{2}[/tex])[tex]\hat{y}[/tex]
find, for time t=2s
1)the acceleration (a)
2)the angular acceleration([tex]\alpha[/tex])
3)the radius of the curve of the path it takes, at t=2s
as far as i can see, i can integrate [tex]\vec{R}[/tex] twice to get the acceleration, but i need the radius to find out ([tex]\alpha[/tex]),...
the only thing i could think of to find the radius is using the equation of a circle
(X-Xo)[tex]^{2}[/tex]+(Y-Yo)[tex]^{2}[/tex]=r[tex]^{2}[/tex]
then plugging in the values of [tex]\vec{R}[/tex](t=2s) in the X and Y, problem is i don't know the Xo, Yo (centre point) of the circle. thought maybe to plug in X,Y at t=0 for Xo Yo but that just seems wrong.
any ideas