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kylinsky
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Homework Statement
two man,each of equal mass m,are standing at one end of a stationary railroad flatcar with frictionless wheel and mass mcar.Find the car's speed if the two men run to the other end of the car and jump off simultaneously with the same speed u(relative to the car)
Homework Equations
The Attempt at a Solution
let vh be the men's speed relative to the ground at the instant they jump off the car.Thus
u= vh+vcar.Since the momentum of the system is conservative,2mvh=mcarvcar
After solving the equations,i got (2mu)/(2m+mcar) ,but i found a different answer from mine on the websitehttp://chriskranenberg.wix.com/taylor-mechanics-solutions.I want to make sure which one is right
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