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[" Arown vertically upward attains a max...

[" Arown vertically upward attains a maximum height of "45m" .The time after which velocity of the ball "],[" qual to half the velocity of projection? (use "g=10m/s^(2)" ) "],[qquad [" f."," 45",=v^(2)-29(1)/(2)k]]

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