A 4 kg block is placed on a rough horizontal surface. The coefficient of friction between the block and the surface is `mu= 0.5`. A force F = 18 N is applied on the block making an angle `theta` with the horizontal. Find the range of values of `theta` for which the block can start moving.
[Take `g = 10 m//s^(2) , tan^(-1)(2) = 63^(@) sin^(-1) ((10)/(9sqrt(1.25))) = 84^(@)`]

A block of mass m=4kg is placed oner a rough inclined plane as shown in figure. The coefficient of friction between the block and the plane is mu=0.5 . A force F=10N is applied on the block at an angle of 30^(@) .

A rectangular block of mass 5 kg is kept on a horizontal surface . The coefficient of friction between the block and the surface is 0.2 . If a force of 20 N is applied to the block at angle of 30^(@) with the horizontal plane , what is the force of friction on the block ? (Take g = 10 m//s^(2) )

A block is kept on a rough horizontal surface as shown. Its mass is 2 kg and coefficient of friction between block and surface (mu)=0.5. A horizontal force F is acting on the block. When

A block of mass m = 4 kg is placed over a rough inclined plane as shown in fig . The coefficient of friction between the block and the plane mu = 0.5 A force F = 10N is applied on the block at an angle of 30^(@) . Find the contact force between the block and the plane. k

A block of mass m = 4.4 kg lies on a horizontal rough surface. The coefficient of friction between the block and the surface is mu = 0.5 . A force F starts acting on the block making an angle theta = 37^(@) to the horizontal. The force changes with time as shown in the graph. (a) At what time the block begins to move ? (b) Calculate the maximum speed attained by the block. [tan 37^(@)=(3)/(4) ,g = 10 ms^(-2)]

A block of 5 kg is resting on a horizontal surface. The coefficient of kinetic friction between the block and the surface is 0.2. What is the acceleration with which the block will remove if a force of 9.8 N is applied to it ?