Homework Help: College Physics

Posted by Austin on Monday, July 5, 2010 at 4:10pm.

How long does it take an automobile traveling in the left lane of a highway at 60.0 km/h to overtake (become even with) another car that is traveling in the right lane at 20.0 km/h when the cars' front bumpers are initially 75 m apart?

College Physics - drwls, Monday, July 5, 2010 at 4:26pm
The 75 m gap between cars is reduced at a rate of 60-20 = 40 km/h, which is 11.11 m/s.

Divide 75 by 11.11 for the number of seconds needed to close the gap.

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