Question

water falls 19.6m the velocity of water when it recahes ground ??​

Answer 1

v=0

u=19.6

total time=5sec

g=9.8m/s square  

t= u/g  

= 19.6/9.8

=2sec to go up  

therefore time to come down =3sec  

height = u square/2g  

=(19.6) square/2*9.8

=19.6m

height =1/2gt square  

1/2 (9.8)*(3)square

=44.1m

height of the building =44.1-19.6

=24.5m

v=gt

= 9.8*3

=29.4m/s

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