(a) Explanation Given: Two point masses connected by a massless rod of length L. Masses are m 1 and m 2 . Formula Used: Moment of inertia can be obtained by: I = ∑ m i x i 2 Where, x i is the distance of the respective masses. Calculations: Mass m 1 is x distance from the rotational axis. So, m 2 would be ( L − x ) distance away from rotational axis (b) To determine To Find: d I d t and the minimum value of I .

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Chapter 9, Problem 46P

(a)

To determine

To Find: Moment of inertia.

(b)

To determine

To Find: dIdt and the minimum value of I .

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Chapter 9, Problem 45P

Chapter 9, Problem 47P

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A capacitor with a capacitance of C = 5.95×10−5 F is charged by connecting it to a 12.5 −V battery. The capacitor is then disconnected from the battery and connected across an inductor with an inductance of L = 1.55 H . At the time 2.35×10−2 s after the connection to the inductor is made, what is the current in the inductor? At that time, how much electrical energy is stored in the inductor?

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