October 8, 2015

Homework Help: physics

Posted by dan on Thursday, May 10, 2012 at 11:54am.

In the 1950s, an experimental train that had a mass of 3.30 104 kg was powered across level track by a jet engine that produced a thrust of 4.90 105 N for a distance of 600 m.
(a) Find the work done on the train.
1 J
(b) Find the change in kinetic energy.
2 J
(c) Find the final kinetic energy of the train if it started from rest.
3 J
(d) Find the final speed of the train if there was no friction.
4 m/s

-how do you find KE?
-whats the "work formula?"
-calculating no friction? isnt that impossible?

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