Question

The mechanical friction ___________ with increase in speed.

(a) increases

(b) reduces

(c) unpredictable

(d) none of the mentioned

The question was posed to me in an interview for job.

I need to ask this question from Mechanical Friction topic in chapter Engine Friction and Lubrication of IC Engine

Answer 1

The correct answer is:

(a) increases

Mechanical friction generally increases with an increase in speed. As speed rises, the relative motion between surfaces intensifies, which can lead to higher frictional forces and heat generation, especially if lubrication is inadequate or the surfaces are in direct contact.