A force acts on an object which is free to move if we know the magnitude of force and mass of the object Newton’s second law of motion enables us to determine the object’s.
A. Weight
B. Speed
C. Acceleration
D. position

Hint: As we know that Newton's second law of motion suggests that if the force is applied on a body having the same mass, then acceleration is produced in the body that is the rate of change of velocity with respect to time, i.e. its acceleration.

Formula used:
$F=m\times a$

Complete answer:
We know that, Newton's second law of motion states that: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Mathematically, it can be written as
$F=m\times a$
Where, ‘F’ is the force act on the body,
‘m’ is the mass of body and
‘a’ is the acceleration of the body.
According to the question, the mass of the object and magnitude of force applied on it are known to us. We have to find the acceleration. We can also write it as,
$a=\dfrac{F}{m}$
Simply by using Newton's second law of motion, we can determine the acceleration of the object.

So, the correct answer is “Option C”.

Additional Information:
When a constant force acts on the body having some mass, it causes the body to accelerate i.e. change in the velocity of the body at a constant time. Mass is scalar quantity but force and acceleration are vector quantities.

Note:
When we apply force on the body, it will start changing its velocity with time. Acceleration is the change in velocity with time. We can easily calculate the acceleration of the object by dividing force and mass of the object. Because force and mass are already known to us.