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CBSE Class 9 Answered

A stone is thrown vertically upward after how much time it will be at height of 5m
Asked by bhoirhimnshu2326 | 26 Jun, 2021, 06:08: AM
Expert Answer
When a stone is thrown vertically, time t taken to reach the height h is determined from the equation of motion
 
h = ( u t ) - [ (1/2) g t2 ]
 
In the above equation of motion , u is inital speed given to the stone that is not given and g is acceleration due to gravity.
 
Above equation is quadratic equation in time t .
By knowing the initial speed u , we solve the quadratic equation to get time t
Answered by Thiyagarajan K | 26 Jun, 2021, 08:32: AM

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