|
|
|
|
|
|
發表於 2010-8-22 13:50
| |
|
| |
|
First law: Every body remains in a state of rest or uniform motion unless it is acted upon by an external unbalanced force.
|
||
|
|
|
|
|
|
|
|
| |
|
First law: Every body remains in a state of rest or uniform motion unless it is acted upon by an external unbalanced force.
|
||
