Incline, pulley and friction!

  • Thread starter jeremy04
  • Start date
  • #1
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Homework Statement



The pulley is light and frictionless. Find the mass M1, given that M2 (6.00 kg) is moving downwards and accelerates downwards at 3.61 m/s2, that θ is 30.0°, and that μk is 0.490.

Homework Equations



F=ma
F||=mg*cos(theta)
Fper=mg*sin(theta)

The Attempt at a Solution



I have no idea where to start this problem..

I know how to find F|| and Fperendicular when theres no pulley/no friction.. no idea where to start..



attachment.php?attachmentid=10919&stc=1&d=1190081198.gif
 

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Answers and Replies

  • #2
learningphysics
Homework Helper
4,099
6
Take the freebody diagram of M1... write [tex]\Sigma\vec{F_x} = m\vec{a_x}[/tex] and [tex]\Sigma\vec{F_y} = m\vec{a_y}[/tex] where x is along the plane, and y is perpendicular to the plane.

similarly write an F=ma equation for M2.
 

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