Supiyanto Kelas X Evaluasi Bab 2 Nomor 8

Kelajuan rata-rata sebuah sepeda yang menempuh jarak 12 km dalam waktu 40 menit adalah …

A. 0,3 km/jam D. 18 km/jam
B. 8 km/jam E. 48 km/jam
C. 10 km/jam

Penyelesaian

Kelajuan rata-rata sepeda

40 menit = 40/60 jam = 2/3 jam

\text{v}=\frac{\text{s}}{\text{t}}=\frac{12\text{ }\!\!~\!\!\text{ km}}{40\text{ }\!\!~\!\!\text{ menit}}=\frac{12\text{ }\!\!~\!\!\text{ km}}{\frac{2}{3}\text{jam}}=18\text{ }\!\!~\!\!\text{ km}/\text{jam }\!\!~\!\!\text{ }

 

Jawaban D

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

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