Question

If the net force on an object is zero, what is the acceleration?

Answer 1

Answer:

The net force acting on the body is zero, the acceleration acting on the object is also zero.  

Explanation:

Let the two equal and opposite forces acts on an object be, f and f'

The net force acting on the object is given by the relation,

The net force is given by the resultant vector,

                             $F= \sqrt{f^{2} + f'^{2} + 2 ff' Cos \theta}$

                             $F= \sqrt{f^{2} - f'^{2} + 2 ff'$   (∵ θ = 180)

                             $F=\sqrt{(f - f')^{2} }$

                             F = f - f'    

Since the magnitude of the forces are equal,

                            F = 0

Hence, the net force acting on the body is zero, the acceleration acting on the object is also zero.