Question

an engine approaching a tunnel at constant speed

Answer 1

Answer:

an engine approaching a tunnel at constant speed has no acceleration.

Explanation:

Answer 2

An engine, approaching a tunnel at constant speed, whistles twice at interval of 10 minutes. The driver hears the echo of the first 20 s after its sounding; while he hears the echo of the second, 16 seconds after its sounding. [Speed of sound=358.8 m/s] Q.

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