Step-by-step explanation:
It is given that,
For a moving object, the force acting on the object varies directly with the objects acceleration.
[tex]F\propto a[/tex]
When the force of 81 N acts in a certain object, the acceleration of the object is 9/ms^2.
[tex]81=k\times 9[/tex]......(1)
If the force is 63 N then,
[tex]63=k\times a_2[/tex]......(2)
On solving equation (1) and (2), we get :
[tex]a_2=7\ m/s^2[/tex]
So, the acceleration of the object is [tex]7\ m/s^2[/tex] when the force acting on it is 63 N. Hence, this is the required solution.
