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A body is relased from the top of a buil...

A body is relased from the top of a building of height 19.6 m. Find the velocity with which the body hits the ground .

Text Solution

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Data : `h=19.6m, u=0m//s,`
`g=9.8m//s^(2), s=19.6m, v=?`
`v^(2)+u^(2)+2gs`
`=2gs" …(as u = 0 m/s)"`
`=2xx9.8m//s^(2)xx19.6m`
`=(19.6m//s)^(2)`
`therefore v=19.6m//s` (downward velocity)
The velocity with which the body hits the ground = 19.6 m/s (downward).
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