Question

class 8th science name one device which reduces friction​

Answer 1

Answer:

A lubricant reduces friction by making this surface smooth

other examples include ball bearings etc.

Answer 2

One of the device that is used for reducing friction is ball bearing.

Explanation:

• Ball bearing is a device which consists of a ring of small metal balls. These balls can roll freely.

• They are designed to make the moving parts of a machine to roll over each other rather than slide.

• Ball bearing is introduced between two surfaces which have to rotate over each other.

• Axle is fixed on the inner side of the ball bearing and wheel is fixed to the outer side of the ball bearing.

• They reduce friction by making the two surfaces to roll over each other.

• This happens due to the rolling action of small metal balls present inside the ball bearing.