The answer is: 15 .
__________________________ _____
{Note: If this is a physics problem ; and the formula: "F = ma" is for:
"Force = mass acceleration" ; be sure that the correct units are used!}.
_______________________________________________________
Explanation:
_______________________________
F = m a ;
Given m = 5 ;
a = 3 ;
___________________
F = 5 3 = 15 .
_____________________
