Concept explainers
A car traveling at 29.1Â m/s drives for 2.5 hours then goes another 75 km. How far did the driver travel in miles?
Interpretation:
The distance (in miles) covered by the car is to determined.
Concept Introduction:
Unit conversion is the method used to convert one unit into another. Significant figures are ones that have a certain meaning to the required accuracy. The distance covered by a body is equal to the product of the speed of that body and the time for which it is traveling.
Answer to Problem 145QP
Solution:
The distance (in miles) covered by the car is calculated as
Explanation of Solution
Given Information: The speed of the car is
The distance covered by the car
Here,
The relation between hour
The conversion factors used to convert
The relation between
The conversion factors used to convert
The relation between kilometer
The conversion factors used to convert
The speed of the car is
The distance,
Therefore, the distance covered by the car is
The given distance of the car is
Therefore, the total distance can be calculated as follows:
The relation between
The conversion factors used to convert
The distance (in miles) covered by the car can be calculated using the conversion factor as follows:
The distance,
After that, the answer obtained,
It can be further rounded off by dropping the last number, which is more than
The distance (in miles) covered by the car is found to be
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