USE WORKSHEET: A $1,249$ kg car has a suspension system with a force constant of $4\mathrm{.}4104$ N$/$m which is at equilibrium when the car hits a bump propelling it initially upward and starting oscillatory motion. How many seconds later does the car next have a maximum vertical velocity?

USE WORKSHEET: A $1,249$ kg car has a suspension system with a force constant of $4\mathrm{.}4104$ N$/$m which is at equilibrium when the car hits a bump propelling it initially upward and starting oscillatory motion. How many seconds later does the car next have a maximum vertical velocity?