A ball is projected vertically upwards from ground P with velocity \( 12 \mathrm{~m} / \mathrm{s...

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A ball is projected vertically upwards from ground
P with velocity \( 12 \mathrm{~m} / \mathrm{s} \) in presence of air drag whose

W magnitude always remains constant during the motion. If ball takes 1 second to reach the highest point in presence of air friction then calculate the difference of time of flights of the ball in presence and in absence of air friction. \( \left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right) \)
(1) \( 0.1 \mathrm{~s} \)
(2) \( 0.18 \mathrm{~s} \)
(3) \( 0.35 \mathrm{~s} \)
(4) \( 1 \mathrm{~s} \)
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