Jawabanmu

2014-04-21T20:41:47+07:00
F = k × Δx
40 = 2000 × Δx
Δx = 2000 : 40
     = 50 m
2014-04-21T21:04:24+07:00
F = k * deltaX
40 N = 2000 N/m * deltaX
deltaX = 2000/40 = 50 m