Tolong bantuin……..​

Jawaban:

f = 1890 putaran/menit = 1890 /60 putaran/detik = 31,5 Hz

a. ω = 2πf = 2π x 31,5 = 63π rad/s

b. θ = ωt

t = 1 detik

θ = 63π x 1 = 63π rad

Penjelasan: