a. weight
Explanation:
Newton's second law of motion states that:
[tex]F=ma[/tex]
where
F is the force acting on an object
m is the mass of the object
a is the acceleration of the object
If we take an object and we want to measure its weight, we can directly use this formula. In fact, the weight of an object is just equal to the force of gravity acting on the object, which is F in the previous formula. The acceleration, in this case, is g, the acceleration due to gravity, so the formula becomes
[tex]F=mg[/tex]
