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A railrod car of ma sM is at rest o frictionless rails when a man of mass m starts movng on the casr towards the engine. The car recoils with a speed v backward on the rails. <br> Let the mass moving with a velocity x w.r.t the engine. <br> `:.` The velocity of the mass w.r.t earth is (x-v) towards right. <br> `V_(CM)=0(Initially at rest)` <br> `:.-0=-Mv+m(x-v)` <br> `rarr Mv=m(x-v)` <br> `rarr mx=Mv+mv` <br> `rarr x=((M+m)/m)v` <br> `=(1+M/m)v` **WHAT IS COM ?**

**Centre Of Mass Of A System N Discrete Particles**

**Centre Of Mass Of A Continuous Mass Distriubution**

**Centre Of Mass Of Uniform Rod**

**Centre Of Mass Of Uniform Semi Circular Ring**

**Centre Of Mass Of Uniform Semi Circular Disc**

**CENTRE OF MASS OF UNIFORM HEMI-SPHERICAL SHELL**

**CENTRE OF MASS OF SOLID HEMI-SPHERE**

**Addition And Subtraction Principle For Calculating Com**

**Velocity Of Centre Of Mass Of System**