Educator

The point of application of a single external force can not be associated with more than one particle. In this sense, the consideration to extend law of motion to many particles system may appear to be meaningless. However, we find that the dynamics of a bunch of even unassociated particles can be studied collectively with startling accuracy and relevance. Newton's second law of motion for the system of particles by differentiating the expression of COM for a system of particles. First differentiation leads to expression of velocity for the COM of the system. Second differentiation leads to expression of acceleration for the system and, in turn, the expression of Newton's second law for the system of particles. Projectile motion on an incline plane is one of the various projectile motion types. The main distinguishing aspect is that points of projection and return are not on the same horizontal plane. There are two possibilities : (i) the point of return is at a higher level than the point of projection i.e projectile is thrown up the incline and (ii) Point of return is at a lower level than point of projection i.e. projectile is thrown down the incline.