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T sin53 - w = 0
T*0,8 - 400 = 0
T = 400/0,8 = 500 N
ΣFx = 0
T cos 53 - m1g = 0
500*0,6 -10m1 = 0
300 - 10m1 = 0
10m1 = 300
m1 = 300/10 = 30kg