A 12,600kg railroad car travels along on a level frictionlesstrack with a constant speed of 18.0 m/s. A 5,350kg load,initially at rest is dropped onto the car. What will be thecars new speed?

generals336

generals336

Answered question

2021-05-10

A 12,600kg railroad car travels along on a level frictionlesstrack with a constant speed of 18.0 m/s. A 5,350kg load,initially at rest is dropped onto the car. What will be the cars new speed?

Answer & Explanation

Alara Mccarthy

Alara Mccarthy

Skilled2021-05-12Added 85 answers

This is mometum conservation problem.
The total linear momentum before = Total p after
That is,m1v1=(m1+m2)v2
Hence v2=m1v1m1+m2=12600×1817950=12.6ms

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