Jawabanmu

2014-02-10T22:46:21+07:00
6.5 semoga betul jangan lupa di terima kasih
2014-02-10T22:59:47+07:00
Diketahui :
m = 1 kg
g = 10m/s²
Δx = 5cm = 5× 10^{-2} m
ditanya : Ep

F = k . Δx
m . g = k . Δx
1 . 10 = k . 5× 10^{-2}
k = 10/5× 10^{-2}
k = 200 N/m

Ep = × k × Δx²
         2
Ep = 1/2 × 200 ×25 × 10^{-4}
Ep = 2500 x  10^{-4}
Ep = 0,25 joule