Respostas

2013-11-18T12:17:11-02:00
Fr² = A² + B²
Fr² = 3² + 4²
Fr = 9 + 16 = 25 = 5.

F = m * a
5 = 2 * a
a = 5 / 2
a = 2,5 m/s²
2 5 2