A \( 2 \mathrm{~g} \) ball of glass is released from the edge of a ...

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A \( 2 \mathrm{~g} \) ball of glass is released from the edge of a
\( \mathrm{P} \) hemispherical cup whose radius is \( 20 \mathrm{~cm} \). How much work is done on the ball by the gravitational
W force during the ball's motion to the bottom of the cup?
(1) \( 1.96 \mathrm{~mJ} \)
(2) \( 3.92 \mathrm{~mJ} \)
(3) \( 4.90 \mathrm{~mJ} \)
(4) \( 5.88 \mathrm{~mJ} \)
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