Resposta :
Energia cinética = m.v^2/2
Ec (A) = 800.1^2/2 = 800/2 = 400J
Ec (B) = 1000.2^2/2 = 4000/2 = 2000J
Ec (C) = 90.8^2/2 = 90.64/2 = 5760/2 = 2880J
Ec(C) > Ec(B) > Ec(A)
Alternativa D
Ec (A) = 800.1^2/2 = 800/2 = 400J
Ec (B) = 1000.2^2/2 = 4000/2 = 2000J
Ec (C) = 90.8^2/2 = 90.64/2 = 5760/2 = 2880J
Ec(C) > Ec(B) > Ec(A)
Alternativa D