Odpowiedź :
Dane:
Vp=0m/s
h=10 m
g=10 m/s²
___________
t=?
Vk=?
Epg=mgh
Ek= (mv²)÷2
Epg=Ek
mgh=(mv²)÷2
gh=(v²)÷2
v²=2gh
v=√2gh
v=√2×10×10
v=√200 m/s
t=√2h÷g
t=√2×10÷10
t=√20÷10
t=√2 s
Vp=0m/s
h=10 m
g=10 m/s²
___________
t=?
Vk=?
Epg=mgh
Ek= (mv²)÷2
Epg=Ek
mgh=(mv²)÷2
gh=(v²)÷2
v²=2gh
v=√2gh
v=√2×10×10
v=√200 m/s
t=√2h÷g
t=√2×10÷10
t=√20÷10
t=√2 s