Aconstant unbalanced force of 2.5 n causes an apple to accelerate at a rate of 10 meters per second squared, downward. find the mass of the apple by completing the three parts of the problem below. newton’s second law of motion can be stated mathematically as force = m x a. that is, force equals mass times acceleration. 1.this equation can be rearranged in two other ways when it is solved for mass or acceleration. using algebra (or the “triangle” method), first rearrange the equation so it is solved for mass. 2.then, solve the problem by plugging in the correct numbers and units. 3.next, calculate an answer. also, be sure to use the correct unit in your answer.