Respostas

2014-03-21T09:51:09-03:00
6)  F = m × a
     50 = 100 × a
     100 × a = 50
     a = 50 / 100
     a = 0,2 m/s²

7) F = m × a
    30 = m × 12
    m x 12 = 30
    m = 30 / 12
    m = 2,5 m/s²