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Exam_3_form D Solutions

# 8 kg assuming a constant net torque is applied to the

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Unformatted text preview: gh its center. The mass of the sphere is 3.8 kg. Assuming a constant net torque is applied to the sphere, how much work is required to bring the sphere to a stop? Note: moment of inertia of a hollow sphere, I S = 2 MR 2 . 3 A) 1.02 J E) 16.3 J W = ΔK = 1 Iω 2 = 1 MR 2ω 2 B) 3.83 J F) 19.9 J 2 3 C) 2.72 J G) 13.4 J 1 = 3 (3.8 kg)(0.25 m)2 (13.0 rad/s)2 = 13.4 J D) 25.5 J H) 8.54 J 1 Form D Exam 3 PHY231 Spring 2013 Section 2 6. A string is wrapped around a pulley of radius 0.20 m and moment of inertia 0.40 kg ⋅ m2. The string is pulled generating an angular acceleration of 14.0 rad/s2. With what magnitude of force was the string pulled? τ = Iα τ = FR A) 14.0 N E) 22.0 N B) 17.0 N F) 28.0...
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