A stone is thrown vertically upward with an initial sped u from the top of Tower. It reaches the ground with a speed of 3u . The height of the tower is a)3usquare/g b)4usquare/g
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Let h be the height of the tower.⇒ v2=u2+2aS⇒ (−3u)2=u2+2(−g)(−h)⇒ 9u2=u2+2gh⇒ 8u2=2gh⇒ h=8u22g⇒ h=4u2g
so opt b
Let h be the height of the tower.⇒ v2=u2+2aS⇒ (−3u)2=u2+2(−g)(−h)⇒ 9u2=u2+2gh⇒ 8u2=2gh⇒ h=8u22g⇒ h=4u2g
so opt b
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