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CBSE Class 11-science Answered

when we apply brakes in the car,it retards the motion;although it is an internal force.why?
Asked by | 26 Feb, 2008, 06:05: PM
Expert Answer

When we apply brakes in the car, it retards the motion;although it is an internal force.why?

For the system of car + brakes + road on which it is moving, the application of brakes constitute extrenal forces hence the car retards.  

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