Well, let's see:
18.2 km / 1.4 hours = 13 km per hour
She is correct, because 13 is less than 17 .
Chiara's mean speed was calculated to be approximately 13 km/h. Since 13 km/h is less than 17 km/h, Chiara is correct in her assertion. Thus, her mean speed is indeed less than 17 km/h.
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Jawaban:Diketahui:- Jarak awal = 140 m- Percepatan mobil (am) = 1.6 m/s²- Sepeda motor diasumsikan dalam posisi diam (tidak bergerak). Ditanya:- Waktu (t) sampai mobil dan sepeda motor bertemu.caranya: 1. Posisi Mobil: xm = (1/2) × am ÷ t^2 = (1/2) × 1.6 × t^2 = 0.8 × t^22. Posisi Sepeda Motor: Karena sepeda motor diam, xs = 140 m (tidak berubah)3. Keduanya Bertemu: Posisi mobil = 140 m0. - 8 × t^2 = 140- t^2 = 140 / 0.8 = 175- t = akar kuadrat dari 175 ≈ 13.23 detik maka, waktu yang diperlukan hingga keduanya bertemu adalah sekitar 13.23 detik.