Supiyanto Kelas X Evaluasi Bab 1 Nomor 5

Kelajuan mobil sebesar 72 km/jam. Jika kelajuan tersebut dikonversikan ke sistem internasional (SI), maka nilainya adalah …

A. 72 m/s D. 10 m/s
B. 1/72 m/s E. 7,2 m/s
C. 20 m/s

Penyelesaian

72\frac{\text{km}}{\text{jam}}=72\times \frac{1000}{3600}\frac{\text{m}}{\text{s}}=20\frac{\text{m}}{\text{s}}

1 km = 1000 m

1 jam = 3600 detik

jawaban C

 

Supiyanto. 2006. FISIKA UNTUK SMA KELAS X. Jakarta: Phiβeta.

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