Physics, 15.12.2019 03:31 hallmansean04
Aball with a mass of 3kg is dropped from the top of a building this is 20m high. what is the velocity of the ball when it is 10m above the ground ?
Answers: 3
![Ep=m*g*h\\where:\\m=3[kg]\\h=20[m]\\](/tpl/images/0419/1874/e3ea4.png)
![Ep=3*9.81*20\\Ep=588.6[J]](/tpl/images/0419/1874/f258e.png)
![Ep=3*9.81*10\\Ep=294.3[m]](/tpl/images/0419/1874/6b5f7.png)
![Ek=\frac{1}{2} *m*v^{2} \\therefore\\v=\sqrt{\frac{Ek*2}{m} } \\v=\sqrt{\frac{294.3*2}{3} } \\\\v=14[m/s]](/tpl/images/0419/1874/33b18.png)
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Aball with a mass of 3kg is dropped from the top of a building this is 20m high. what is the velocit...
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