Question

A bicycle with tires $68 \mathrm{~cm}$ in diameter travels $7.2 \mathrm{~km}$. How many revolutions do the wheels make?

   A bicycle with tires $68 \mathrm{~cm}$ in diameter travels $7.2 \mathrm{~km}$. How many revolutions do the wheels make?

Physics for Scientists and Engineers with Modern Physics

Physics for Scientists and Engineers with Modern Physics

Douglas C. Giancoli 4th Edition

Chapter 10, Problem 6

Instant Answer

Solved by Expert James Kiss

09/21/2022

Step 1

We know that 1 meter is equal to 100 centimeters, so we divide 68 by 100 to get 0.68 meters. \[Diameter = \frac{68}{100} = 0.68 \, meters\] Show more…

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A bicycle with tires $68 \mathrm{~cm}$ in diameter travels $7.2 \mathrm{~km}$. How many revolutions do the wheels make?

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Key Concepts

Circumference of a Circle

This concept involves finding the distance around a circle by using the formula C = ? * d, where d is the diameter of the circle. It is essential in calculating how far a wheel travels in one complete rotation.

Unit Conversion

This concept is about converting measurements from one unit to another, ensuring that all quantities in an equation are expressed in the same unit system. Converting the distance traveled (e.g., kilometers to centimeters) is crucial for accurate calculations.

Division/Proportional Reasoning

This concept involves determining how many times one quantity is contained within another. In the context of the problem, it is used to find the number of wheel revolutions by dividing the total distance traveled by the distance covered in one revolution (the circumference).

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