besarnya kuasa F adalah?

Dik : W = 160 N
Lb= 1 m
Lk= 2m
Dit : F?
Jaw : lk = l - lb
lk = 3 - 1 = 2 m
f x 2 = W x lb
f x 2 = 160 x 1
f = 160/2 = 80 N
maap klo salahh