January 2019 0 28 Report
Sebuah kipas berputar sebanyak 20 putaran per menit.Jika ujung kipas berada 20 cm dari sumbu putarnya, kecepatan tangensial ujung kipas adalah
a.2π/15 m/s
b.4π/6 m/s
c.8π m/s
d.40π m/s
e.80π m/s

(cara)

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