№1 Дано:
m1=10 кг
m2= 5 кг
R = 5 м
----------------
F-?
№2
Дано:
F1=20 Н
a1=1 м/c2
F2= 30 Н
-------------------
a2=?
№3
Дано:
R= 1/2 Rземли
g=1/2 gземли
------------------------
U1=?
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