Resposta :
P = m*g
P = 20*10
P = 200N
F = P = 200N
40cm = 0,4m
F = K * x
200 = K * 0,4
200/0,4 = K
****************
K = 500N/m.
****************
Epg = m*g*h
Epg = 20*10*10
Epg = 20*100
Epg = 2000 Joules
Epe = K *x² / 2
2000 = K * (0,4)² / 2
2000 = K * (16*10^-2)/2
4000 /16*10^-2 = K =
4000 * 10^2 / 16 = K
********************
K = 25.000N/m
********************
P = 20*10
P = 200N
F = P = 200N
40cm = 0,4m
F = K * x
200 = K * 0,4
200/0,4 = K
****************
K = 500N/m.
****************
Epg = m*g*h
Epg = 20*10*10
Epg = 20*100
Epg = 2000 Joules
Epe = K *x² / 2
2000 = K * (0,4)² / 2
2000 = K * (16*10^-2)/2
4000 /16*10^-2 = K =
4000 * 10^2 / 16 = K
********************
K = 25.000N/m
********************