Find the required quantity given the wire that lies along the curve r and has density ?.Moment of inertia Iy about the y-axis, where r(t) =
i + 4tj, 0 ? t ? 1; 
A. Iy = - 100
B. Iy = 100
C. Iy = - 20
D. Iy = 20
Answer: D
Mathematics