Respostas

2013-11-27T18:35:34-02:00
Ec = mv²/2
Ec = 70.5²/2
Ec = 1750/2
Ec = 875J ;] 
2 3 2
2013-11-27T18:37:51-02:00
Ec = mv²/2
Ec = 70.5²/2
Ec = 70.25/2
Ec = 1750/2
Ec = 875 J.
1 5 1