a train of mass 240 tonne is moving, at a speed of 84 km/h, up an incline of 1 in 90. the resistance to motion is 45 n per tonne. if power is removed, calculate the distance travelled along the incline before the train comes to rest(adsbygoogle = window.adsbygoogle || []).push({});

and

a railway wagon of mass 10 tonne travelling due east with a velocity of 14 kmh on a straight section of track collides with a second wagon of mass 12 tonne travelling due west at 3 km/h if thery are locked together after impact find the magnitude and direction of their common velocity.

i have no idea how to work it out, my notes have gone missing

i dont know where to begin, can someone help me with it please?

i dont mean do it for me i mean give me help in doing so, be it via email of instant message

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Help with kinetic and dynamic principles

**Physics Forums | Science Articles, Homework Help, Discussion**