A player throws a ball upwards with an initial speed of \( 30 \mathrm{~m} \mathrm{~s}^{-1} \). H...

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A player throws a ball upwards with an initial speed of \( 30 \mathrm{~m} \mathrm{~s}^{-1} \). How long does the ball take to return to the players hands? (Take \( g=10 \mathrm{~m} \mathrm{~s}^{-2} \) )
(a) \( 3 \mathrm{~s} \)
(b) \( 6 \mathrm{~s} \)
(c) \( 9 \mathrm{~s} \)
(d) \( 12 \mathrm{~s} \)
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