Example 6 On a 80 km track, a train travels 40 km with a uniform speed of 30 km h¬l. How fast must the train travel the next 40 km so as to have average speed 40 km h-l for the entire trip ?

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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= 4.5 km
1-5 km
Avera
(a) Average velocity
= 2-25 km/h
(40/60) h
4.5 km
(b) Average speed =
= 6-75 km/h
%3D
(40/60) h
Example 6 On a 80 km track, a train
travels 40 km with a uniform speed of 30 km h-l.
How fast must the train travel the next 40 km so
as to have average speed 40 km h-l for the entire
trip ?
Ex
at 8.00 a
Transcribed Image Text:= 4.5 km 1-5 km Avera (a) Average velocity = 2-25 km/h (40/60) h 4.5 km (b) Average speed = = 6-75 km/h %3D (40/60) h Example 6 On a 80 km track, a train travels 40 km with a uniform speed of 30 km h-l. How fast must the train travel the next 40 km so as to have average speed 40 km h-l for the entire trip ? Ex at 8.00 a
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