a person sitting on the top of a tall building is dropping balls at regular intervals of one second . find the position of the 3rd , 4th and the 5th ball when the 6th ball is dropped

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Solution

When 6th ball is dropped the 5th, 4th and 3rdhad travelled 1, 2 and 3 second respectively. So the position of the third ball will be
S3=12gt2=12×9.8×32=44.1 m from the top.

The position fo the fourth ball will be

S4=12gt2=12×9.8×22=19.6 m from the top

The position fo the 5 ball is
S5=12gt2=12×9.8×12=4.9 m from the top

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