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anyways, when making a forces diagram, i know the friction points back but does anything point forward? is there a force pushing it (after its been hit) and if so, how do you find it?

what i did to solve it was say the net force equals Fpuck - Ffriction = ma

they gave the mass and i solved for acceleration using regular kinematics but i had to assume Fpuck was 0. is that true? the answer came out correct but i dont know why the Fpuck=0.