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W=1,5g*10m/s²*1,2m=18J
m-1,5kg
g-10m/s²
h-1,2m
m=1500g=1,5kg
h=120cm=1,2m
g=10 m/s2
SZUKANE:
W=?
OBLICZENIA:
W=E
W=m*g*h
W= 1,5*10*1,2=18J
W=18J
Odp.: Praca mięśni wynosiła 18J.
m=1500g=1,5kg
g=10m/s²
F=Q
Q=m×g
Q=1,5kg×10m/s²=15N
W=F×s
W=15N×1,2m=18J