(Answered) Problem a hamster of mass m is placed on a massless wedge

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Problem: A hamster of mass m is placed on a massless wedge whose upper frictionless surface is angled at θ with respect to the horizontal. Its lower surface has enough friction so that the wedge does not slip with respect to the scale which measures the weight of the hamster.

2232_weight of the hamster.jpg

a. What reading will the scale give in terms of m, g, and θ?

b. Suppose instead that the upper surface has a non-zero coefficient of kinetic friction, μ_s, and that the hamster is placed on it already moving down the incline. Now what weight will the scale read in terms of m, g, θ, and μ_s?

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