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As shown in Fig. 10-2, a constant force of 40 N is applied tangentially to the rim of a wheel with 20-cm radius. The wheel has a moment of inertia of 30 kg • m2. Find (a) the angular acceleration, (b) the angular speed after 4.0 s from rest, and (c) the number of revolutions made in that 4.0 s. (d) Show that the work done on the wheel in the 4.0 s is equal to the KEr of the wheel after 4.0 s. |
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