A Pendulum Bob Has Potential Energy U₀ When Held Taut

question 72

Multiple Choice

A pendulum bob has potential energy U₀ when held taut in a horizontal position. The bob falls until it is 30° away from the horizontal position, when it has potential energy U_A. It continues to fall until the string is vertical, when it has potential energy U_B. Compare its potential energies at O, A, and B.

• A) U₀ = U_A = U_B.
• B) U_A − U_B = 2U₀.
• C) U_A − U_B = U₀ − U_A.
• D) U₀ = U_B = 2U_A.
• E) U₀ − U_A = 2(U_A − U_B).

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Definitions:

Emotional Maltreatment

Rejection, terrorization, isolation, exploitation, degradation, ridicule, or failure to provide emotional support, love, and affection; or other action or inaction that may cause behavioral, cognitive, emotional, or mental disorders.

Rejection

The act of dismissing, refusing, or not accepting someone or something.

Terrorization

The act of instilling intense fear or terror in others, often used as a method of coercion or control.

Premises

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