Homework Statement
X=12(y^2-y^3) Rotation is around y=-2/5
Homework Equations
V=2pi from the integral of a to b (shellradius)(shell height) dx
The Attempt at a Solution
2pi (-2/5+y)(12)(y^2-Y^3)dy
24pi (-2/5+y)(y^2-y^3)dy
24pi (-2/5y^2+7/5y^3-y^4)dy
24pi...
Problem: The vector A = (4.0meters)i + (-3.0meters)j
Find a) its magnitude and b) its angle in relation to i.
Question: I know magnitude is a scalar but don't know what I am really trying to find in this problem. Am I looking for the direct point from the start of i to the end of j? Do I...