b) Consider the case where the angle 0 is 16.8° and the penguin is not moving relative to the ground. Using Newton's Second Law of Motion [and the free-body diagram from part (a)], determine the force of friction on the penguin. Note that the solution for the force of friction should be written in unit vector notation using the rotated coordinate system. Assume the mass of the penguin is 5.11 kg and that g = 9.81 m/s?. Answer in units of N with 3 sig figs. Hint: force of friction, f; µs N, as this expression gives us the maximum force of static friction that is possible, not necessarily the force of friction that is present.

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.