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f = 90N
h=5m
dit = keuntungan mekanik?
jwb .
w= f×h
= 90N × 5m
= 450 Nm
f = w/s
= 450 Nm / 2m
=225 N
keuntungan mekanik
= w/f
=450 Nm / 225 N
= 2.