Increasing and Reducing Friction
Increasing and Reducing Friction: Overview
This topic covers concepts, such as, Reducing Friction Using Ball Bearing, Methods to Increase Friction, Using Lubricants between Contact Surfaces & Polishing the Contact Surfaces etc.
Important Questions on Increasing and Reducing Friction
Which of the following substance can reduce the force of friction?
A boy rolled a rubber ball on a wooden surface. The ball travelled a short distance before coming to rest.
To make the same ball travel longer distance before coming to rest, he may
Are the statements given below true or false?
The value of friction decreases with the use of lubricant.
Rolling friction is slightly greater than the sliding friction.
Lubricant oils are used as fuel in vehicles and kitchen.
_____ (Talcum powder/Sand) is sprinkled on the carrom board to reduce friction.
Oil applied to a surface to reduce friction better serves as a :
Lubricants are used to increase friction.
Rolling _____ (reduces/increases) friction.
Why do we spray powder on carrom board?
The tyres used in vehicles have grooves in them. Why?
How do we reduce friction on board while playing carrom?
Choose the correct answer from the bracket and fill in the blank.
_____ (Oiling/ Rubbing) reduces friction between parts of a machine.
