1. On a certain stretch of track, trains run at 60 mph. How far back of a stopped train should a warning torpedo be placed to signal an oncoming train? Assume that the brakes are applied at oce and retard the train at the uniform rate.of 2 ft per sec.

An Introduction to Physical Science
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ISBN:9781305079137
Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Publisher:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Chapter2: Motion
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Problem 10E: A race car traveling northward on a straight, level track at a constant speed travels 0.750 km in...
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1. On a certain stretch of track, trains run at 60 mph. How far back of a
stopped train should a warning torpedo be placed to signal an oncoming train?
Assume that the brakes are applied at once and retard the train at the uniform
rate.of 2 ft per sec.
2. A stone is thrown vertically upward and returns to earth in 10 sec. What
was its initial velocity and how high did it go?
Transcribed Image Text:1. On a certain stretch of track, trains run at 60 mph. How far back of a stopped train should a warning torpedo be placed to signal an oncoming train? Assume that the brakes are applied at once and retard the train at the uniform rate.of 2 ft per sec. 2. A stone is thrown vertically upward and returns to earth in 10 sec. What was its initial velocity and how high did it go?
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