A toy train engine of mass ME = 6 kg sits on the upper left part of a track, as shown in the diagram. Starting from rest, the train begins to coast down the slope until it reaches the flat region a height h = 1 m below its starting point. You may assume that there is no friction for all parts of this problem. a) How fast is the train engine moving when it reaches the lower flat region of the track? b) Now the engine collides elastically with a stationary train car of mass Mc =2 kg. How fast is the train car moving immediately after it is struck by the engine? c) What is the ratio of kinetic energy of the train car over the kinetic energy of the engine immediately after the collision?

A toy train engine of mass ME = 6 kg sits on the upper left part of a track, as shown in the diagram. Starting from rest, the train begins to coast down the slope until it reaches the flat region a height h = 1 m below its starting point. You may assume that there is no friction for all parts of this problem. a) How fast is the train engine moving when it reaches the lower flat region of the track? b) Now the engine collides elastically with a stationary train car of mass Mc =2 kg. How fast is the train car moving immediately after it is struck by the engine? c) What is the ratio of kinetic energy of the train car over the kinetic energy of the engine immediately after the collision?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter10: Systems Of Particles And Conservation Of Momentum

Section: Chapter Questions

Problem 41PQ: There is a compressed spring between two laboratory carts of masses m1 = 105 g and m2 = 212 g....

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