Explanation:
(a) So in order to find acceleration you would have to transpose the formula given so that acceleration is the subject of the equation;
F=ma
Because mass is multiplying acceleration to transpose this so that "a" is the subject you would do the opposite of Multiplication on the other side;
F=ma
a/f=m
a=fm
This now has "a" as the subject.
(b) This is the formula we will be working with ( a=fm) because this problem requires "a" to be the subject of the equation.
a=fm
a= -25 units × 5 units
a= -125 units
(c)The same rule applies mass is suppose to be the subject of the equation .
F=ma
m/f=a
m=fa
m = 25 units × 2.5 units
m = 62.5 units