A freight car with a mass of 25000kg rolls down an inclined frictionless track t

Question

A freight car with a mass of 25000kg rolls down an inclined frictionless track through a vertical distance of 1.5m. At the bottom of the incline, on a level track, the car collides and couples with another 20000kg freight car that was at rest. Calculate a.) gravitational potential energy of first car at the top of the track, b.) velocity of the first car on the level track before collision, c.) total kenetic energy of the two cars before collision, d.) total momentum of the two cars before collision, e.) velocity of coupled cars after velocity, f.) kinetic energy of the coupled cars after the collision. What percentage of the initial kinetic energy is lost in the collision?

Explanation / Answer

x.x.s of the first car m1 = 25000 Kg

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