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Vertiviper
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Homework Statement
A man (weighing 915 N) stands on a long railroad flatcar (weighing 2005 N) as it rolls at 17.0 m/s in the positive direction of an x axis, with negligible friction. Then the man runs along the flatcar in the negative x direction at 46.00 m/s relative to the flatcar. What is the resulting increase in the speed of the flatcar?
Homework Equations
Pi=Pf
The Attempt at a Solution
Pi=m1v1+m2v2
Pi= 5065.49
Pf=m1(-46.0m/s+ 17m/s) + m2 (Vi+17m/s)
V=18.26 -incorrect