A railway car of mass 20 tonne moves with an initial speed of 54 km h^-1. On applying brakes, a constant negative acceleration of 0.3 ms^-2 is produced. (a) What is the braking force acting on the railway car? (b) In what time it stops?

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Appearing for exams could be stressful for students. Even though they might have prepared well, they could suffer from anxiety, tension etc. These are not good for their health and mind. However, following a few exam preparation tips can save them from all these and help them to score good marks. Let’s find out all...

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