physics-ASAP

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a crate on a frictionaless plank inclined at angle theta with respect to the horizontal. Which of the follwing relationships is true? (assume that the x-axis is parallel to the surface of the incline)
a)Fy = Fg
b)Fx=0
c)Fy=Fx
d)none of the above

*my answer would be c but i need to make sure ASAP
thx

  • physics-ASAP -

    force gravity is not in the y direction
    Fx is the force down the plank, and without friction, the object is accelerating, and fx=ma, which is not zero
    Fy cannot generally be Fx

    Your answer doesn't make sense.

  • physics-ASAP -

    The answerwould be C.

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