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Pavlova-9 [17]
3 years ago
10

Um ônibus percorre a distância de 480 km, entre Santos e Curitiba, com velocidade escalar média de 80 km/h. De Curitiba a Floria

nópolis, distantes 300 km, o ônibus desenvolve a velocidade escalar média de 75 km/h. Qual a velocidade escalar média do ônibus entre Santos e Florianópolis?
Physics
2 answers:
Mariulka [41]3 years ago
7 0

Answer:

10 h

Explanation:

velocidade é a taxa de variação da distância no tempo. é a razão entre a distância e o tempo

de Santos e Curitiba:

distância (d) de 480 km, velocidade (s) de 80 km/h

s=\frac{d}{t}\\ t=\frac{d}{s} =\frac{480}{80}=6h

de Curitiba e Florianópolis:

distância (d) de 300 km, velocidade (s) de 75 km/h

s=\frac{d}{t}\\ t=\frac{d}{s} =\frac{300}{75}=4h

tempo médio de ônibus entre Santos e Florianópolis = 6h + 4h = 10h

WITCHER [35]3 years ago
6 0

Answer:

78 km/h

Explanation:

To solve this problem, we need to find the total distance and time travelled, then we can divide them to find the average speed.

From Santos and Curitiba, the time travelled is:

480 = 80 * t1

t1 = 480 / 80 = 6 hours

From Curitiba to Florianopolis, the time travelled is:

300 = 75 * t2

t2 = 300 / 75 = 4 hours

So, the total time travelled is t1 + t2 = 10 hours

And the total distance travelled is 480 + 300 = 780 km

Then, we can calculate the average speed:

speed = 780 / 10 = 78 km/h

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