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  1. #1
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    physics

    Hi,

    I am trying to help my brother do this problem but I can't figure it out! can anyone please help me...


    A 3.45 kg object is moving in a plane, with its x and y coordinates given by x = 7t - 3 and y = 4t + 3, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting on this object at t = 2.35 s.
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    Quote Originally Posted by jenjen View Post
    Hi,

    I am trying to help my brother do this problem but I can't figure it out! can anyone please help me...


    A 3.45 kg object is moving in a plane, with its x and y coordinates given by x = 7t - 3 and y = 4t + 3, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting on this object at t = 2.35 s.
    \sum \bold{F} = m \bold{a} = m \frac{d^2\bold{x}}{dt^2}

    So the x component of the force would be:
    F_x = m(14)

    and the y component would be...?

    -Dan
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