Giancoli's Physics: Principles with Applications, 7th Edition
2
Describing Motion: Kinematics in One Dimension
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2-1 to 2-3: Speed and Velocity
2-4: Acceleration
2-5 and 2-6: Motion at Constant Acceleration
2-7: Freely Falling Objects
2-8: Graphical Analysis

Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 10
Q

# Every year the Earth travels about $10^9 \textrm{ km}$ as it orbits the Sun. What is Earth's average speed in km/h?

A
$1\times10^5$

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VIDEO TRANSCRIPT

This is Giancoli Answers with Mr. Dychko. The Earth travels 10 to the 9 kilometers in its orbit around the Sun in 1 year and we'll have to turn that 1 year into hours in order to calculate the kilometers per hour—speed of the Sun. So we'll take 1 year times 365.25 days per year and then multiply by 24 hours per day and this gives us 114077 kilometers an hour and this is sort of estimated units here so we'll just take estimated values so we'll just take one significant figure. So we have 1 times 10 to the 5 kilometers per hour is the Earth's speed around the Sun.

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