A stone falls from a ballon that id desc...

A stone falls from a ballon that id descending at a uniform rate of 12m/s. The displacement of the stone from the point of release after 10 sec is

490m

510m

610m

725m

Text Solution

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The correct Answer is:

Initial velocity of stone u=12m/sec downwards
`therefore` displacement `h=ut+(1)/(2)"gt"^(2)`
`=12xx10+(1)/(2)xx9.8xx(10)^(2)`
`=120+400=610 m`

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