Question

Asked Sep 10, 2019

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A train makes a round trip on a straight, level track. The first half of the trip is 300km and is traveled at a speed of 75 km/m. After a 0.50 h layover, the train returns the 300km at the speed of 85 km/h. What is the train’s (a) average speed and (b) average velocity?

Step 1

Given:

For first half of the trip

Distance covered by train *s _{1} *= 300 km

Speed of the train *v _{1}* = 75 km/h (assumed)

Layover time of the train = 0.50 h

Time taken by the train during its first trip

Step 2

For second half of the trip

Distance covered by train *s _{2} *= 300 km

Speed of the train *v _{2 }*= 85 km/h

Time taken by the train during its second trip

Step 3

(a) Average speed of the trai...

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