# Kinematics | Problem 1.14

Irodov I.E. - Problems in General Physics (1981)

## PHYSICAL FUNDAMENTALS OF MECHANICS | Kinematics

### Problem 1.14

A train of length $$l = 350$$ m starts moving rectilinearly with constant acceleration $$\omega = 3.0 \cdot 10^{-2}$$ m/s$$^2$$; $$t = 30$$ s after the start the locomotive headlight is switched on (event $$1$$), and $$\tau = 60$$ s after that event the tail signal light is switched on (event $$2$$). Find the distance between these events in the reference frames fixed to the train and to the Earth. How and at what constant velocity $$v$$ relative to the Earth must a certain reference frame $$K$$ move for the two events to occur in it at the same point?