Curvature=|r'(t)xr''(t)|/|r'(t)|^3Find Curvature of r(t)=t*i+(1/2)t^2*j+t^2*k

[Math10]

Homework Statement

Find the curvature of r(t)=t*i+(1/2)t^2*j+t^2*k.

Homework Equations

None.

The Attempt at a Solution

r'(t)=<1, t, 2t>
r"(t)=<0, 1, 2>
r'(t)xr''(t)=<0, t, 4t>

 

[Dick]

Homework Statement

Find the curvature of r(t)=t*i+(1/2)t^2*j+t^2*k.

Homework Equations

None.

The Attempt at a Solution

r'(t)=<1, t, 2t>
r"(t)=<0, 1, 2>
r'(t)xr''(t)=<0, t, 4t>

You should really state what your question is, but the cross product is wrong.