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Math Help - physics, force stuff

  1. #1
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    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.



    help please?
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  2. #2
    Kai
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    Quote Originally Posted by sarabolha View Post
    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.



    help please?
    As shown >> where is it ?
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  3. #3
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    its just making a referece to the picture, the light string is what is connecting the two masses...
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  4. #4
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    I'm guessing m_2 is a hanging mass.

    let T = magnitude of the tension in the string between m_1 and m_2.

    F = magnitude of the applied force on m_1

    N = magnitude of the normal force on m_1 by the horizontal surface

    net force on m_2 ...

    T - m_2g = m_2a

    net force on m_1 ...

    F\cos(30.9) - \mu N - T = m_1a

    where ...

    N = m_1g - F\sin(30.9)

    m_1 and m_2 will experience the same magnitude of acceleration ... solve the system of equations for "a".
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