|
|
|
|
|
|
|
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.
|
|




發表於 2010-8-31 11:42
| 


