(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A train with a mass of 250 tonnes starts from rest and accelerates up an incline of 1 in 100 attaining a speed of 45 Kph after traveling 200m. If the frictional resistance to motion is constant at 30KN calculate the work done by the engine using the principle of conservation of energy

2. Relevant equations

Possible relevant equations:

Work done= Force*Distance

Force=Mass*acceleration

Kinetic energy = 1/2*Mass*Velocity^2

Potential energy= Mass*Gravity (9.81)* Height

3. The attempt at a solution

Force= 250*103 Kg*12.5= 3 125 000 kg/m/s

Work done= 3 125 000*200= 625 000 000(J)

Not sure whether this is along the right lines or not. I am also unsure where the frictional resistance and gravity is used.

Thank you for your time.

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# Mechanics - work done conservation of energy *Help needed*

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