
physics, force stuff
Mass m1=25.7 kg is on a horizontal surface, connected to mass m2= 5.10 kg by a light string as shown. The pulley has negligible mass and no friction. A force of 222.5 N acts on m1 at an angle of 30.9o.The coefficient of kinetic friction between m1 and the surface is 0.233. Determine the upward acceleration of m2.
http://nplq1.phyast.pitt.edu/res/msu...2_tenpully.gif
help please?

Quote:
Originally Posted by
sarabolha Mass m1=25.7 kg is on a horizontal surface, connected to mass m2= 5.10 kg by a light string as shown. The pulley has negligible mass and no friction. A force of 222.5 N acts on m1 at an angle of 30.9o.The coefficient of kinetic friction between m1 and the surface is 0.233. Determine the upward acceleration of m2.
http://nplq1.phyast.pitt.edu/res/msu...2_tenpully.gif
help please?
As shown >> where is it ?

its just making a referece to the picture, the light string is what is connecting the two masses...

I'm guessing $\displaystyle m_2$ is a hanging mass.
let T = magnitude of the tension in the string between $\displaystyle m_1$ and $\displaystyle m_2$.
F = magnitude of the applied force on $\displaystyle m_1$
N = magnitude of the normal force on $\displaystyle m_1$ by the horizontal surface
net force on $\displaystyle m_2$ ...
$\displaystyle T  m_2g = m_2a$
net force on $\displaystyle m_1$ ...
$\displaystyle F\cos(30.9)  \mu N  T = m_1a$
where ...
$\displaystyle N = m_1g  F\sin(30.9)$
$\displaystyle m_1$ and $\displaystyle m_2$ will experience the same magnitude of acceleration ... solve the system of equations for "a".