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m=2kg
h=200m
t2=2s
g=9,81m/s^2
tc=?
V2=?
Vk=?
a) tc=?
s=(at^2)/2
2s=at^2
t^2=2s/a
b) v2=?
V2=at2=9,81m/s^2 * 2s= 19,62 m/s
c)Vk=?
Vk=atc=9,81m/s^2 * 6,3855 s= 62,64 m/s