thewalkingdead11424 thewalkingdead11424

25-10-2018
Physics

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a ball dropped from rest falls freely intil it hits the ground with the speed of 20 m/s . the tine furing which the ball is in free fall is approximately

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LammettHash LammettHash

25-10-2018

With uniform acceleration of [tex]1g[/tex], we can use the formula for average acceleration to determine the time of freefall:

[tex]g=9.8\,\dfrac{\rm m}{\mathrm s^2}=\dfrac{20\,\frac{\rm m}{\rm s}-0}t\implies t\approx2.0\,\rm s[/tex]

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