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19 March, 16:07

The bob (weight) at the end of a pendulum has a mass of 0.3 kilograms. The bob is pulled to position B and allowed to swing. It goes all the way to position C and swings back.

The potential energy of the bob at position B is

joules. If the maximum height of the bob is 0.45 meters when it swings back,

joules of energy was transformed to thermal energy.

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  1. 19 March, 16:21
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    The answer is

    the potential energy of the bob at position B is 1.47 joules.

    If the maximum height of the bob is 0.45 meters when it swings back, 1.323 joules of energy was transformed to thermal energy.
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