Friction

This topic covers concepts such as Friction, Direction of Friction, etc.

This topic covers concepts such as Factors Affecting Friction, Types of Friction, Sliding Friction, Static Friction, etc.

This topic covers the concept of the Necessity of Friction.

This topic covers concepts such as Rolling Friction, Methods to Decrease Friction, Using Lubricants between Contact Surfaces, Polishing the Contact Surfaces, Reducing Friction Using Ball Bearing, Methods to Increase Friction, etc.

This topic covers concepts such as Viscosity of Fluids, Factors Affecting Viscous Force, Viscous Forces, etc.

This topic covers concepts such as Earthquake, Cause of Earthquakes, Effect of Earthquake, Richter Scale, Protection against Earthquakes, etc.