Test Preparation on Friction-Physics Test Series For NEET 2020

A block is lying static on the floor. The maximum value of static frictional force on the block is 10N . If a horizontal force of 8 N is applied to the block, what will be the frictional force on the block

A system consists of three masses m1, m2 and m3 connected by a string passing over a pulley P. The mass m1 hangs freely and m2 and m3 are on a rough horizontal table (the
coefficient of friction = μ). The pulley is frictionless and of negligible mass. The downward acceleration of mass m1 is (Assume m1 = m2 = m3 = m)

A block weighing W is held against a vertical wall by applying a horizontal force F. The minimum value of F needed to hold the block is

A man drags a block through 10m on rough surface (μ = 0.5). A force of √3kN acting at 30º to the horizontal.
The work done by applied force is

A boy of mass 40 kg is climbing a vertical pole at a constant speed. If the coefficient of friction between his palms and the pole is 0.8 and g=10 m/s² , the horizontal force that he is applying on the pole is