Q1: The maximum frictional force which comes into play, when a body just begins to slide over the surface of a an other body, is known

ANS:C - limiting friction

The maximum frictional force that comes into play when a body just begins to slide over the surface of another body is known as "limiting friction." Limiting friction represents the maximum amount of frictional force that can be exerted between two surfaces before relative motion starts or impending motion occurs. Once the applied force exceeds the limiting friction, the object will start to move or slide. Therefore, limiting friction plays a crucial role in determining the threshold for motion in static situations.