# Physics help

**URL:** <https://forum.kirupa.com/t/physics-help/241597>\
**Category:** Uncategorized\
**Created:** [October 16, 2007, 12:00am UTC](https://forum.kirupa.com/t/physics-help/241597 "2007-10-16T00:00:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![lilac722](https://avatars.discourse-cdn.com/v4/letter/l/9d8465/32.png) [@lilac722](https://forum.kirupa.com/u/lilac722)\
**Post date:** [October 16, 2007, 12:00am UTC](https://forum.kirupa.com/t/physics-help/241597/1 "2007-10-16T00:00:47Z")

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In the apparatus shown in Fig. 4.38, _m_1 = [COLOR=#000000]1.9[/COLOR] kg, ![](http://forum.kirupa.com/uploads/kirupa/4101/0159ee9308041616.gif) = [COLOR=#000000]40[/COLOR]°, and the coefficients of static and kinetic friction between _m_1 and the inclined plane are 0.30 and 0.20, respectively.  
[CENTER] ![](http://www.webassign.net/wb/4-38alt.gif)  
[/CENTER]  
INDENT What is _m_2 if both masses are at rest?  
between kg and kg

(b) What is _m_2 if both masses are moving at constant velocity? Neglect all friction.  
between kg and kg[/INDENT]