Homework Help: Physics

Posted by MA on Friday, November 2, 2012 at 7:28pm.

What push parallel to a 42 incline is required to just start a 340 N block sliding up the plane? us = 0.6

Physics - Elena, Saturday, November 3, 2012 at 3:39am
x: 0 =F-m•g•sinα-F(fr)
y: 0=N-m•g•cosα,

0 =F-m•g•sinα-F(fr)= F-m•g•sinα- μ•N=
=F - m•g•sinα- μ•m•g•cosα.
F = m•g(sinα- μ•cosα)=
= 340•(sin42-0.6•cos42)=...

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