A car travels at 35.0 mph for 0.5 hours, at 65.0 mph for the next 2.5 hours and finally at 80.0 mph for 1.5 hours. The car's average velocity for the entire journey was around 80 mph None of these are correct 180 mph 60 mph 67 mph

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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A car travels at 35.0 mph for 0.5 hours, at 65.0 mph for the next 2.5 hours and
finally at 80.0 mph for 1.5 hours. The car's average velocity for the entire journey
was around
80 mph
O None of these are correct
180 mph
60 mph
67 mph
Transcribed Image Text:A car travels at 35.0 mph for 0.5 hours, at 65.0 mph for the next 2.5 hours and finally at 80.0 mph for 1.5 hours. The car's average velocity for the entire journey was around 80 mph O None of these are correct 180 mph 60 mph 67 mph
Expert Solution
Step 1

Average velocity is calculated by the formula,

V = S/t

S = V×t 

Where, V equals the average velocity, S equals total displacement and t equals total time.

Given,

Velocity,  V= 35 mph 

Time,  t= 0.5 h 

Velocity,  V= 65 mph 

Time,  t= 2.5 h 

Velocity,  V= 80 mph 

Time,  t= 1.5 h 

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