Uzupełnij (zakreskowane miejsca) i oblicz
Ek(J)
40
400
-----
m(kg)
------
50
8
v(m/s)
2
------
5
Ek(J)
40
400
-----
m(kg)
------
50
8
v(m/s)
2
------
5
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1) 40=(m*2^2)/2
80=4m
m=20[kg]
2)Ek=(m*v^2)/2
v=sqrt(2Ek/m)
v=sqrt(2*400/50)
v=sqrt16
v=4(m/s]
3)Ek=(m*v^2)/2
Ek=(8*5^2)/2
Ek=(8*25)/2
Ek=200/2
Ek=100[J]