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20 May, 10:58

A 15 kg tv sots on a shelf at a height of 0.3 m. how much gravitational potential energy is added to the television when it is lifted to a shelf of height 1.0 m?

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  1. 20 May, 13:51
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    Gravitational potential energy can be described as m*g*h (mass times gravity times height).

    Originally,

    15kg * 9.8m/s^2 * 0.3 m = 44.1 kg*m^2/s^2 = 44.1 Joules.

    After it is moved to a 1m shelf:

    15kg * 9.8m/s * 1 = 147 kg*m^2/s^2 = 147 Joules.

    To find how much energy was added, we subtract final energy from initial energy:

    147 J - 44.1 J = 102.9 Joules.
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