A person travels by car from one city to another with different constant speeds between pair of cities. She drives for 30 min at 80 km/hr, 12 min at 100 km/hr and 45 min at 40 km/h and spends 15 min eating lunch and buying gas a. Determine the average speed for the trip b. Determine the distance between the initial and final cities along the route. O 52.9 km/hr, 90 km 24 45km/h, 110 km O 78 km/h, 60 km

A person travels by car from one city to another with different constant speeds between pair of cities. She drives for 30 min at 80 km/hr, 12 min at 100 km/hr and 45 min at 40 km/h and spends 15 min eating lunch and buying gas a. Determine the average speed for the trip b. Determine the distance between the initial and final cities along the route. O 52.9 km/hr, 90 km 24 45km/h, 110 km O 78 km/h, 60 km

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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Concept explainers

Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.

Question

A person travels by car from one city to another with different constant
speeds between pair of cities. She drives for 30 min at 80 km/hr, 12 min
at 100 km/hr and 45 min at 40 km/h and spends 15 min eating lunch and
buying gas
a. Determine the average speed for the trip
b. Determine the distance between the initial and final cities along the
route.
O 52.9 km/hr. 90 km
O45 km/h, 110 km
O78 km/h, 60 km

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