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A girl rolls a marble from rest down a slide. If there is no friction and the initial height of the
slide is 3 meters, what is the final velocity of the marble?
Begin your solution with qualitative bar graphs and an energy flow diagram.
Energy (J)
Ek Eg Eel
Position A
System/Flow
O
Energy (J)
Ek Eg Eel Eth
Position B

A girl rolls a marble from rest down a slide If there is no friction and the initial height of the slide is 3 meters what is the final velocity of the marble Be class=

Respuesta :

Answer:

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Explanation:

All of the Potential Energy (mgh) will be

          converted to Kinetic Energy(1/2 mv^2)

mgh = 1/2 mv^2      divide through by 'm'

gh = 1/2 v^2     solve for 'v'

v = sqrt ( 2gh)     substitute in the given values

v = sqrt (2 * 9.81 * 3 ) = 7.7 m/s

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