(a). f = ma (a) solve this equation for a.
a = m/f
(b) let the force be units and the mass be m = 10 units. what is the acceleration, a?
a = 10/f
(c) let the force be f = 25 units and the acceleration be a = 5 units. what is the mass, m?
m = 25 / 5 = 5 units