Write important guidance for solving problems in mechanics

Explanation

We can solve different problems of dynamics using Newton s three laws of motion which we have learned
to solve the problem we should proced according to the following steps
(1) Draw a schematic diagram showing the assembly of different object other object connected with them and those which support these objects
(ii) Select the object as system of which we want to discuss the motion if the system than one object themn take care than the acceleration vector of all teh objects should be the same.
(iii) Make a list of the forces acting on the system by the remaining parts of the assembly and by other agnecies . in this list the forces acting inside the system are not to be included.
(iii) If necessary you will take another system third law . For example in FBD of a the force exerted by B on A is shown as F then in FBD of B the force exerted on B by A can be shown as `- vec(F )`