Jawabanmu

2013-12-15T18:10:27+07:00
Rumus kecepatan pada tali atau dawaii  \sqrt{ \frac{F.l}{m}}
lamda = 0,3
 l = 300 m
F = 4000 N
m = 30 kg

v =  \sqrt{ \frac{F.l}{m}}

v = \sqrt{ \frac{4000.300}{30}}

v = \sqrt{ \frac{40000}

v = \sqrt{ \frac{40000}

v = 200 m/s2

v = lamda.f
f = v/lamda
f = 200/0,3
f = 66,67