Homework Help: Physics

Posted by Dar on Thursday, February 18, 2010 at 8:53pm.

In the 1950s, an experimental train that had a mass of 2.65 104 kg was powered across a level track by a jet engine that produced a thrust of 5.25 105 N for a distance of 509 m. Assume that air resistance is negligible.

(b) Find the change in kinetic energy.
J____
(c) Find the final kinetic energy of the train if it started from rest.
J____
(d) Find the final speed of the train if there had been no friction.
m/s____

Physics - drwls, Thursday, February 18, 2010 at 10:20pm
(b) Work done = Force x distance
(c) same as (b)
(d) sqrt [2*(K.E)*M]
Physics - Rafael, Sunday, February 21, 2010 at 11:06pm
There is an error in the form for question (d)

vf = sqrt [2*(K.E)/M]

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