Calculate the average velocity between t=0 and t=7.5 minutes
In heavy rush-hour traffic you drive in a straight line at 12 m/s for 1.5 minutes, then you have to stop for 3.5 minutes, and finally you drive at 15 m/s for another 2.5 minutes. Calculate the average velocity between t=0 and t=7.5 minutes.
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Railroad car of mass M is moving at a speed of V when it collides with a second railroad car of mass M which is at rest. The two cars lock together instantaneously and move along the track. what is the speed of the cars immediately after the coll
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