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02-02-2019
Physics

contestada

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? What is the pebble's speed when it has fallen 29.4 m ?

Respuesta :

hrzlatevski hrzlatevski

03-02-2019

Data given:

Δx=29,4m

Data needed:

t=?

v=?

Formula needed:

v=√2gh

v=Δx/t

Solution:

v=√2×9,81×29,4

v=24m/s

t=Δx/v

t=1,225s

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