Respostas

2014-06-29T13:49:20-03:00
Ec = m . V² / 2
Ec=3.1600/2
Ec=4800/2
Ec=2400
  • Usuário do Brainly
2014-06-29T14:01:50-03:00
Boa tarde!

Então:

 Ec \frac{m*v^2}{2}
 Ec \frac{3*40^2}{2}
 Ec \frac{3*1.600}{2}
 Ec \frac{4.800}{2}
 Ec= 2.400 J  <---------------