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A stone is thrown vertically up from the...

A stone is thrown vertically up from the tower of height 25m with a speed of 20 m/s What time does it take to reach the ground ? `(g=10 m//s^(2))`

Text Solution

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`x_(2)-x_(1)=15t` (linear part), `x_(2)-x_(1)=200+30 t-5 t^(2)` (curved part).
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