After driving at a steady speed for 30km, Mario reacher the expressway where he increased his speed to 45km/hr. If after 120km of travel on the expressway his total travel time was 2 hours, what was his speed before reaching the expressway?
After driving at a steady speed for 30km, Mario reacher the expressway where he increased his speed to 45km/hr. If after 120km of travel on the expressway his total travel time was 2 hours, what was his speed before reaching the expressway?
An Introduction to Physical Science
14th Edition
ISBN:9781305079137
Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Chapter2: Motion
Section: Chapter Questions
Problem 1AYK: Do highway speed limit signs refer to average speeds or to instantaneous speeds? Explain.
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After driving at a steady speed for 30km, Mario reacher the expressway where he increased his speed to 45km/hr. If after 120km of travel on the expressway his total travel time was 2 hours, what was his speed before reaching the expressway?
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The problem says that he increased his speed to 45km/hr.
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The problem says "he increased his speed to 45km/hr" so why is the second velocity 45km/hr + velocity 1?
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