Odpowiedzi

2009-10-17T13:23:36+02:00
P = F/S
F = 3N
a)
s = 50 cm² = 0,00005m²
P = 3N/0,00005m²
P = 60 000 Pa = 60 kPa

b)
s = 150 cm² = 0,000 15 m²
P = 3N / 0,000 15 m²
P = 20 000 Pa = 20 kPa
c)
S = 75 cm² = 0, 000 075 m²
P = 3N / 0, 000 075 m²
P = 40 000 Pa = 40 kPa