Tolong nmor 48 diselesaikan butuh

ep = 1/2 * F * delta x
ep = 1/2 * k * delta x * delta x
ep = 1/2 * 10/0.04 * 0.1^2
ep = 1/2 * 250 * 0.01
ep = 1.25
= 1/2 . 10 . 4 =