Question

a stone is throne upward with a speed of 'u' from the top of the tower reaches the ground with the velocity '3u'. find height of tower

Answer 1

Heya.......!!!!

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This question can be easily solved by applying the equation => v^2 = u^2 + 2gh .

Here :-

the body is thrown upward with velocity ' u ' and the ball returns with velocity ' 3u '

• initial velocity = u
• final velocity = 3u

• acceleration due to gravity = g
• Height of the tower = h = ?

=> ( 3u )^2 = u^2 + 2gh
=> 9u^2. = u^2 + 2gh
=> 9u^2 - u^2 = 2gh
=> 8u^2 = 2gh

=> 2gh = 8u^2
=> h = 8u^2 / 2g

=> h = 4u^2 / g

$height \: \: = > \: \: \frac{4u {}^{2} }{g}$


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