Find v, the speed of the string after it has been pulled by F⃗ over a distance d. Express the speed of the string in terms of F, d, k, and m; do not include α, ω, or Iw in your answer.

Adielectric-filled parallel-plate capacitor has plate area a = 30.0 cm2 , plate separation d = 9.00 mm and dielectric constant k = 3.00. the capacitor is connected to a battery that creates a constant voltage v = 15.0 v . throughout the problem, use ϵ0 = 8.85x10-12 c2/n.m2 . find the energy u1 of the dielectric-filled capacitor.