Răspuns:
a)
G =mg=2kg x 10 N/kg= 20N
b)
S1 = 5 x 10 cm^2 = 50×10^-4 m^2
P1 = G/S1 = 4×10^3 Pa
S2= 10×20 cm^2= 200×10^-4 m^2
P2=G/S2=1×10^3 Pa
