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A stone is dropped into water from a bri...

A stone is dropped into water from a bridge 44.1 m above the water. Another stone is thrown vertically downward 1 s later. Both strike the water simultaneously. What was the initial speed of the second stone?

Text Solution

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`t=sqrt((2xx44.1)/9.8)s=sqrt9s`=3s ,
`44.1=vxx2+1/2xx9.8xx2xx2`
or 2v=44.1-4.9 x 4 =24.5
or `v=24.5/2 m s^(-1)=12.25 ms^(-1)`
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