Question

Bardzo proszę o pomoc proszę zrobić wszystkie zadania

Answer 1

1.
V=2m³
ρ=5kg/m³
g=10 m/s²
m=ρV=5∙2=10 kg
Q=m∙g=10∙10 = 100 N

2.
p=200 Pa
A=6m²
F=p∙A= 200∙6 = 1200N

3.
m=5kg
a=5cm = 0.05 m
b=10cm = 0.1 m
g=10m/s²

A=a∙b=0.05∙01 = 0.005 m²
Q=m∙g = 5∙10 = 50N
p=Q/A=50/0.005 = 10 000 Pa = 100 hPa

4.
p=20hPa = 2 000 Pa
F=2N
A=F/p = 2/2000 = 0.001 m² = 10cm²

5.
A1=10cm²
A2=100cm²
N1=400N
p=N1/A1=N2/A2
N2=N1 ∙ A2/A1 = 400 ∙ 100/10 = 4000N