|
Back to the end of the world:
|
|
|
|
 |
 | |  |
| Say, post-apocalyptic-former-college-student-with-no-legs, is that your old physics textbook under that stop sign? | |
 | |  |
|
|
|
|
|
|
|
| | |
| Yes it is - I liked it. It's one of those books that moves a generation... | |
| | |
|
|
|
|
|
|
|
|
| | |
| ...at velocity v, with friction force F... | |
| | |
|
|
|
|
