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Question : 84 of 160
Marks:
+1,
-0
Solution:
(c) Displacement equation of ball moving in vertical plane,
y=Pt2−Qt3 The ball will reach at maximum height, if
‌‌=0∴‌‌‌(Pt2−Qt3)‌=0⇒‌‌2Pt−3Qt2‌=0⇒t(2P−3Qt)=0∴‌‌t≠0,2P−3Qt‌=0⇒‌‌t‌=‌ ∵ Maximum height attained by the ball,
‌ymax=Pt2−Qt3‌‌ When, ‌t=‌‌‌=P(‌)2−Q(‌)3‌‌=‌−‌=‌
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