How long does it take for the last car to come to rest momentarily?


Posted November 9th, 2010 by admin 1 Comment »
car
lisa asked:


A train is traveling up a 4.4 degrees incline at a speed of 2.45 m/s when the last car breaks free and begins to coast without friction.
How long does it take for the last car to come to rest momentarily?
How far did the last car travel before momentarily coming to rest?

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Posted in Physics | 1 Comment »

What cars in a train typically contain bombs in a terror attack?


Posted December 16th, 2009 by admin 2 Comments »
cars
sparky89 asked:


I commute using mass transit in the NYC area and was wondering in all the terror attacks on mass transit across the world what are the most popular cars in a train to get attacked? The first? The last car? All the cars at the same-time? Answers from professionals are welcome

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Posted in Law Enforcement & Police | 2 Comments »

Is it advisable idling my car ten seconds before driving to maintain the car battery?


Posted August 16th, 2009 by admin 3 Comments »
car
Queen Bee asked:


1 car trip = 2 miles, and I drive the car three days a week. How about idling it after I finish driving? In other words, what can I do to maintain the car battery? My last car battery died out after seven months but I have never left the car lights on.

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Posted in Maintenance & Repairs | 3 Comments »