InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
A railroad car of mass M is at rest on frictionless rails when a man of mass m strts moving on the car towards the engine. If the car recoils with a speed v backward on the rails, with what velocity is the man aproaching the engine? |
|
Answer» Correct Answer - A 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. Let the mass moving with a velocity x w.r.t the engine. `:.` The velocity of the mass w.r.t earth is (x-v) towards right. `V_(CM)=0(Initially at rest)` `:.-0=-Mv+m(x-v)` `rarr Mv=m(x-v)` `rarr mx=Mv+mv` `rarr x=((M+m)/m)v` `=(1+M/m)v` |
|