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chloesmolinski0909
14.07.2019 •
Physics
Astudent drops a rock from a bridge to the water 12.7 m below. with what speed does the rock strike the water? the acceleration of gravity is 9.8 m/s 2
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Ответ:
The rock strike the water with the speed of 15.78 m/sec.
The speed by which rock hit the water is calculated by the formula
v=![\sqrt{2gh}](/tpl/images/0089/2741/cfcb1.png)
v=![\sqrt{2*9.8*12.7}](/tpl/images/0089/2741/6070b.png)
v=15.78 m/sec
Hence, the rock strike the water with the speed of 15.78 m/sec.
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