Resposta :
Ec = m * V²/2
72 = 1 * V² / 2
144 = V²
V = 12 m/s
Q = m * v
Q = 1 * 12
Q = 12kg*m/s
I = Q
I = F*/\t
12 = 2,4 * /\t
12/2,4 = /\t
**********************
/\t = 5 segundos
**********************
72 = 1 * V² / 2
144 = V²
V = 12 m/s
Q = m * v
Q = 1 * 12
Q = 12kg*m/s
I = Q
I = F*/\t
12 = 2,4 * /\t
12/2,4 = /\t
**********************
/\t = 5 segundos
**********************