Physics 173 Internet
Question of the Week
April 27 - May 1, 1998
- If you've been doing the questions of the week, then you
probably know by now that The Exploratorium Museum in San
Francisco has some pretty cool science stuff. Take another
virtual tour to the Exploratorium. (Use a search engine to find it
if you do not know the URL.) From the Exploratorium home page,
click on "Sport! Science." Browse the various articles if you
wish, but eventually navigate to the page titled "That's the Way
the Ball Bounces." The page is the first page of a series of four
pages pertaining to the physics of baseball (and particularly the
physics of bounce). Once you have found the page, answer
the following questions (2 pts).
- Describe the search path which you used to locate
the page (see example description).
- Describe the changes in a baseball's construction since
1911 and the effect which it had on the baseball's bounce.
- Observe the sample data in the Dropping Balls section on
the second page of the article. Explain the trends in the data
- that is, explain why some of the balls bounce higher than
others. Be specific in your explanations. (You may want to read
the third page of the article before completing the
- Summarize the Why Do Balls Bounce section on the third page
of the article. Comment on the variables which would effect the
bounce of a ball.
- Describe and explain the baseball manager's freezing trick
as described on the fourth page of the article.
A 1.18-kg baseball bat moving horizontally at 18.9 m/s hits a
0.221-kg baseball sitting upon a tee. The baseball is set in
motion with a horizontal velocity of 48.2 m/s. Assuming a
perfectly elastic collision in an isolated system (a big
assumption), determine the post-collision velocity of the baseball
bat. (1 pt.) PSYW
South Physics Team -
4000 West Lake Ave
Glenview, IL 60025 - 1200
Page Maintained by: Tom Henderson
Last Updated: April 24, 1998