Two balls of the same size but of different materials, rubber and iron, are kept on the smooth floor of a moving train. The brakes are applied suddenly to stop the train. Will the balls start rolling? If so, in which direction? Will they move with the same speed?
Model Answer & Options
Source: ExemplarNo, the balls will remain stationary.
Yes, the balls will roll forward with the same speed.
Yes, the balls will roll backward with the same speed.
Yes, the balls will roll backward, but with different speeds.
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