There will be no relative motion between P and Q if pseudo force on block P is less than or just equal to limiting friction between P and Q.
i.e. `m("KA"/"2m")` Limiting friction
Maximum friction = `"KA"/2`
The first law of thermodynamics is based on :–

If the static friction between two surface P and Q is measured to be 50 N, then the sliding friction between these two surface is most likely to be :

Friction is the force which opposes the relative motion between two surfaces in contact with each other. What is a limiting static friction?State the laws related to this.

Friction between any two surfaces in contact is the force that opposes the relative motion between them The force of limiting friction (F) between any two surfaces in contact is directly proportional to the normal reaction (R) between them F prop R or F = mu R where mu is coefficient of limiting friction If theta is angle of friction then mu = tan theta A force of 49N is just able to move a block of wood weighing 10kg on a rough horizontal surface The coefficient of friction is .

Friction between any two surfaces in contact is the force that opposes the relative motion between them The force of limiting friction (F) between any two surfaces in contact is directly proportional to the normal reaction (R) between them F prop R or F = mu R where mu is coefficient of limiting friction If theta is angle of friction then mu = tan theta The angle of friction in the above question is .

The coefficient of friction between the block A of mass m & block B of mass 2m is mu . There is no friction between A & B is released from rest & there is no slipping between A & B then:

Limiting (i.e., maximum) static friction is slightly less than sliding friction.

A block of mass m lying on a rough horizontal surface of friction coefficient mu is pulled by a force F as shown , the limiting friction between the block and surface will be

A : During horizontal circular turn of a car, the centripetal force required should be less than the limiting friction between its tyres and road. R : The centripetal force to car is provided by the frictional force between its tyres and the road.