First slide
Vertical projection from ground
Question

A stone is thrown upward with speed u attains maximum height h. Another stone thrown upwards from the same point with speed 2 u attains maximum height H. What is the relation between h and H

Easy
Solution

Using the formula v2 = u2 + 2 g h,we have
o=u2-2gh or u2=2gh
0=(2u)2 -2gH or 4u2 = 2gH
hH=14 or 4h=H

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