Question

4. वह पदार्थ जो घर्षण को कम करता है, -------- कहलाता है।
The substance which reduce friction are called
AA लेना-
OT​

Answer 1

Answer:

Lubricant

Explanation:

A lubricant is a substance, usually organic, introduced to reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move. It may also have the function of transmitting forces, transporting foreign particles, or heating or cooling the surfaces.