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physicsnnewbie
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Homework Statement
A train travels dist 's' in 't' secs. It starts and ends at rest. In first part of journey it moves with const accel 'f', and in second part with const decel 'r'. Show that s = [fr/(f + r)]t^2/2 where f & r are accel and decel
Homework Equations
The Attempt at a Solution
I spent at least an hour trying to figure it out, but not sure how