Define the coefficient of static friction and kinetic friction.

A force of 750 N is applied to a block of mass 102 kg to prevent it from sliding on a plane with an inclination angle 30^@ with the horizontal. If the coefficients of static friction and kinetic friction between the block and the plane are 0.4 and 0.3 respectively, then the frictional force acting on the block is

The coefficient of static friction may be

A block of mass 1kg is at rest on a rough horizontal surface having coefficient of static friction 0.2 and kinetic friciton 0.15, find the frictional forces if a horizontal force, (a) F=1N (b) F=1.96N (c) F=2.5N is applied on a block

A body of mass 25 kg is at rest on a horizontal surface. Minimum horizontal force required to just start motion is 73.5N and a force of 49N is needed to keep the body moving with a constant velocity. What is the coefficient of (i) static friction and (ii) kinetic friction ?

A 60kg is pushed horizontaly with just enough force to start it moving across a floor and the same force continues to act afterwards. The coefficient of static friction and sliding friction are 0.5and 0.4 respectively the accleration of the body is

A 60 kg body is pushed with just enough force to start it moving across a floor and the same force continues to act afterwards. The coefficient of static friction and sliding friction are 0.5 and 0.4 respectively. The acceleration of the body is

A block of mass 5kg is lying on a rough horizontal surface. The coefficient of static and kinetic friction are 0.3 and 0.1 and g= 10 ms^(-2) The frictional force on the block is

A block is kept on a rough surface and applied with a horizontal force as shown which is gradually increasing for zero. The coefficient of static and kinetic friction are 1//sqrt3 then

A uniform disc of mass m and radius R is rolling up a rough inclined plane which makes an angle of 30^@ with the horizontal. If the coefficients of static and kinetic friction are each equal to mu and the only force acting are gravitational and frictional, then the magnitude of the frictional force acting on the disc is and its direction is .(write up or down) the inclined plane.

A body of mass 60 kg is dragged with just enough force to start moving on a rough surface with coefficient of static and kinetic frictions 0.5 and 0.4 respectively . On applying the same force , what is the acceleration ?