Physics

posted by Nala

An object of mass M = 1,338 g is pushed at a constant speed up a frictionless inclined surface which forms an angle θ = 50 degrees with the horizontal. Incline is increasing. What is the magnitude of the force that is exerted by the inclined surface on the object?

  1. bobpursley

    What is the normal component of weight?

  2. Nala

    ok, so what do you mean by component of weight? anyways, this is what i thought should be the answer F= mgsin(θ) is that correct?

  3. Gharib

    Tilt your axis such that, Y is pointing to the opposite of Weight of M. And X is pointing towards the right. (like usual). [The axis shown in the diagram requires you to find Fnet, which I don't know how to find; thus use this method].

    In that case,

    Positive being up,

    -W(of M)+Ncos50=0
    => N=Mg/cos50

    plug your numbers, that's your answer.

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