Newton’s second law equation net force (in n) acceleration (in m/s2 ) = a = _f_ m mass (in kg) m = 0.5 kg f = 10 n or 10 kg•m/s2 a urgent a = _f_ m substitute the values for f and m into the formula and divide: 20 kg•m/s2 a=_1_0__n_== 0.5 kg kg 20 m/s2 acceleration = 20 m/s2 6. solve for force a 24-n net force acts on an 8-kg rock. what is the acceleration of the rock