HW for Tuesday

First, some Fermi questions to play with:

1.  How many hairs are on your head?

2.  How many times does one of the tires on a car rotate in its lifetime?

3.  How many toilets are there in all of the major league football stadiums, baseball parks, and basketball arenas in the USA?

Now some motion math.

4.  What is the difference between traveling at an average speed vs. a constant speed (for the same distance)?  In other words, if you were traveling at an average speed of 5 m/s vs. traveling at a constant speed of 5 m/s, would you go a greater distance in either case (after, say, 10 minutes)?  Discuss.

5.  Find the definition of acceleration and write it down.

6.  Consider a car traveling at a constant 10 m/s in a straight line.  What would a graph of distance (or position) vs. time look like for 50 seconds of travel time?  What would a graph of speed vs. time look like for the same time period?