A 10 kg block is placed on a horizontal surface whose coefficient of friction is 0.25. A horizontal force P = 15 N first acts on it in the eastward direction. Later, in addition to P a second horizontal force Q = 20 N acts on it in the northward direction : (Both east and west are in the plane of the fig and the gravity acts perpendicular to this plane )

A block of mass 1 kg is pushed up a surface inclined to horizontal at an angle of 60∘ by a force of 10 N parallel to the inclined surface as shown in figure. When the block is pushed up by 10 m along inclined surface, the work done against frictional force is : [g=10 m/s2]

A block of mass 6 kg is being pulled by force 24 N as shown. If coefficient of friction between block and the surface is 0.6, frictional force acting on the block is   A.36 N  B.32 NC.12 N  D.none of these

The figure below shows the forces exerted on an object that is sliding on a horizontal surface:Fg: the gravitational force of 40 N,Fn: the 40 N normal force exerted by the surface, andFf: a frictional force exerted to the left.If the coefficient of friction between the block and the surface is 0.15, then which of these most nearly represents the acceleration of the block?   Group of answer choices2 m/s2 to the left1.5 m/s2 to the left2 m/s2 to the right1.5 m/s2 to the right

`A 40 kg slab rests on a frictionless floor. A 10 kg block rests on top of the slab. The static coefficient of friction between the block and the slab is 0.60 while the kinetic coefficient is 0.40. The 10 kg block is acted upon by a horizontal force of 100 N. If g = 9.8 m/s2 the resulting acceleration of the slab will be  A.0.98 m/s2B.1.47 m/s2  C.1.52 m/s2D.6.1 m/s2

A 2.66-kg block is at rest on a horizontal floor. If you push horizontally on the 2.66-kg block with a force of 12.7 N, it just starts to move. What is the coefficient of static friction?