Most of the machines use ball bearings in order to reduce friction. How is rolling mo fficient than sliding? A. The mass of the object reduces. B. It provides lubrication between the surfaces. C. Interlocking between the surfaces increases. D. The area of contact between the surfaces is low.
Answers
Answer:
Bearings reduce friction by means of a rolling motion
Bearings reduce friction by means of this rolling motion. The "rolling bearing", with its rolling motion, reduces friction more than the "plain bearing" with its sliding motion, allowing for a greater decrease in the amount of energy consumption during rotation.
The force of friction depends on the area of contact between the two surfaces. ... As the area of contact is less in the case of rolling than in the case of sliding, rolling friction is less than the sliding friction.
In many parts of the machine where friction is undesirable, the ball bearings (small steel balls) are generally kept between the rotating parts so as to reduce friction. The rolling of the balls in bearing converts sliding friction into rolling friction.
By polishing the surface, as polishing makes the surface smooth and friction can be reduced. Using lubricants such as oil or grease can reduce the friction between the surfaces. When objects are rolled over the surface, the friction between the rolled object and surface can be reduced by using ball bearings
Answer:
the machine use ball beri bearings in order to reduce friction. How is rolling mo fficient than sliding? A. The mass of the object reduces. B. It provides lubrication between the surfaces. C. Interlocking between the surfaces increases. D. The area of contact between the surfaces is low.