Question

A student observes ball bearings in the slide track of his drawer. Why are ball bearings used in the drawer? How is rolling more efficient than sliding?

Answer 1

Answer:

Ball bearing reduce friction because they roll rather than slide. Because the balls are rolling they have a much lower coefficient of friction than if two flat surfaces were sliding against each other. Ball bearings tend to have lower load capacity for their size than other kinds of rolling-element bearings due to the smaller contact area between the balls and races.

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Answer 2

Answer:

parts of neurone various parts of the structure of the great

Explanation:

middle oblongata cerebrum cerebellum thalamus pons