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question_answer1) A block of mass m lying on a rough horizontal plane is acted upon by a horizontal force P and another force Q inclined at an angle \[\theta \] to the vertical. The block will remain in equilibrium, if the coefficient of friction between it and the surface is [Haryana CEE 1996]
question_answer2) Which of the following is correct, when a person walks on a rough surface [IIT 1981]
question_answer3) A block of mass 0.1 kg is held against a wall by applying a horizontal force of 5 N on the block. If the coefficient of friction between the block and the wall is 0.5, the magnitude of the frictional force acting on the block is [IIT 1994]
question_answer4) A body of mass M is kept on a rough horizontal surface (friction coefficient \[\mu \]). A person is trying to pull the body by applying a horizontal force but the body is not moving. The force by the surface on the body is F, where [MP PET 1997]
question_answer5) What is the maximum value of the force F such that the block shown in the arrangement, does not move [IIT-JEE Screening 2003]
question_answer6) A block P of mass m is placed on a frictionless horizontal surface. Another block Q of same mass is kept on P and connected to the wall with the help of a spring of spring constant k as shown in the figure. \[{{\mu }_{s}}\] is the coefficient of friction between P and Q. The blocks move together performing SHM of amplitude A. The maximum value of the friction force between P and Q is [IIT-JEE (Screening) 2004]
question_answer7) A body of mass m rests on horizontal surface. The coefficient of friction between the body and the surface is \[\mu .\] If the mass is pulled by a force P as shown in the figure, the limiting friction between body and surface will be [BHU 2004]
question_answer8) A 40 kg slab rests on a frictionless floor as shown in the figure. A 10 kg block rests on the top of the slab. The static coefficient of friction between the block and slab is 0.60 while the kinetic friction is 0.40. The 10 kg block is acted upon by a horizontal force 100 N. If \[g=9.8\,m/{{s}^{2}}\], the resulting acceleration of the slab will be [NCERT 1982]
question_answer9) A block of mass 2 kg rests on a rough inclined plane making an angle of 30° with the horizontal. The coefficient of static friction between the block and the plane is 0.7. The frictional force on the block is [IIT 1980; J & K CET 2004]
question_answer10) When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is such that it acts [IIT 1990; Manipal MEE 1995; MP PET 1996]
question_answer11) An insect crawls up a hemispherical surface very slowly (see the figure). The coefficient of friction between the insect and the surface is 1/3. If the line joining the centre of the hemispherical surface to the insect makes an angle \[\alpha \]with the vertical, the maximum possible value of \[\alpha \] is given by [IIT-JEE 2001]
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