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ρ=1800kg/m3 V=?
g=10N/kg W=?
s=30m
V=30m*2m*1m
V=60m3
ρ=m/V
m=ρ*V
m=1800*60[kg/m3 * m3=kg]
m=108 000kg
F=m*g
F=108 000 * 10[kg*N/kg=N]
F=1`080`000N
W=F*s
W=1`080`000 * 30[N*m=J]
W=32`400`000J
W=32,4MJ
prosze;)
ρ=1800kg/m3
g=10N/kg
s=30m
szukane:
V=? W=?
obliczenia
V=30m*2m*1m
V=60m3
ρ=m/V
m=ρ*V
m=1800*60[kg/m3 * m3=kg]
m=108 000kg
F=m*g
F=108 000 * 10[kg*N/kg=N]
F=1`080`000N
W=F*s
W=1`080`000 * 30[N*m=J]
W=32`400`000J
W=32,4MJ