Archive for the ‘Physics’ Category

What is the speed of two railroad cars after they collide?

Friday, September 21st, 2007

finding.4ever asked: A railroad car of ams m is moving at speed v when it collides with a second railroad car of mas M which is at rest. The two cars lock together instantaneously and move along the track. What is the speeed of the cars immediatly after the collision? How would ...

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Suppose a car can accelerate at 1m/s2. How large a break in traffic is needed to enter a highway where cars?

Friday, May 18th, 2007

Vivian C asked: Suppose a car can accelerate at 1m/s2. How large a break in traffic is needed to enter a highway where cars are moving a 20m/s if the drive wants to avoid forcing the next car to slow down or to approach closer than 25m?CHADWICK

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