A block is placed on a rough floor such that it won't slip. Block is cubical. If elastic PE stored in it is `(F^(2))/(x eta l)` .Find x.

A block is placed on a rough floor and a horizontal force F is applied on it.The force of friction f by the bloor on the block is measured for different values of F and a graph is plotted between them.

A spring block system is placed on a rough horizontal floor. Force constant of the spring is k. The block is pulled to right to give the spring an elongation equal to x_0 and then it is released. The block moves to left and stops at the position where the spring is relaxed. Calculate the maximum kinetic energy of the block during its motion.

A spring block system is placed on a rough horizontal floor. The block is pulled towards right to gives spring some elongation and released, Then :

A spring block system is placed on a rough horizontal floor. The block is pulled towards right to give spring some elongation and released.

A spring block system is placed on a rough horizontal floor. The block is pulled towards right to give spring an eleongation less than (2 mu mg)/(K) but more than (mu mg)/(K) and released. The correct statement is :

A block is placed on a rough horizontal plane attached with an elastic spring as shown in the figure. Initially spring is unstretched. If the plane is now gradually lifted from 0^(@) to 90^(@) , then the graph showing extension in the spring (x) versus angle (theta) is

A block of mass m is placed on a rough floor of a lift . The coefficient of friction between the block and the floor is mu . When the lift falls freely, the block is pulled horizontally on the floor. What is the force of friction -

A block is placed on a rough horizontal plane. Three horizontalforces are applied on the block as shown in the figure. If the block is in equilibrium, find the friction force acting on the block.

A block of mass 'm' is placed on a rough surface with a vertical cross section of y =(x^(3))/(6) . If the coefficient of friction is 0.5 , the maximum height above the ground at which the block can be placed without slipping is .

A block of mass m is placed on a rough horizontal floor and it is pulled by a ideal string by a constant force F as shown. As the block moves towards right the friction force on block