A bar of mass m is pulled by means of a thread up an inclined plane forming an angle `alpha` with the horizontal (figure). The coefficient of friction is equal to k. Find the angle `beta` which is thread must form with the inclined plane for the tension of the thread to be minimum. What is it equal to?

A bar of mass m is pulled by means of a thread up an inclined plane forming an angle theta with the horizontal as shown in figure-2.211. The coefficient of friction is mu . Prove that (a) alpha=tan^(-1)mu , where alpha is the angle which the thread must from with the inclined plane for the tension of the thread to be minimum.

A body of mass m is pushed with the initial velocity v_0 up an inclined plane set at an angle alpha to the horizontal. The friction coefficient is equal to k. What distance will the body cover before it stops and what work do the friction forces perform over this distance?

A body of mass 10 kg is lying on a rough plane inclined at an angle of 30^(@) to the horizontal and the coefficient of friction is 0.5. the minimum force required to pull the body up the plane is

A block of mass m is placed on a rough plane inclined at an angle theta with the horizontal. The coefficient of friction between the block and inclined plane is mu . If theta lt tan^(-1) (mu) , then net contact force exerted by the plane on the block is :

A block of mass m is placed on a rough plane inclined at an angle theta with the horizontal. The coefficient of friction between the block and inclined plane is mu . If theta lt tan^(-1) (mu) , then net contact force exerted by the plane on the block is :

An inclined plane is inclined at an angle theta with the horizontal. A body of mass m rests on it, if the coefficient of friction is mu , then the minimum force that has to be applied to the inclined plane to make the body just move up the inclined plane is

Two touching bars 1 and 2 are placed on an inclined plane forming an angle alpha with the horizontal (figure). The masses of the bars are equal to m_1 and m_2 , and the coefficients of friction between the inclined plane and these bars are equal to k_1 and k_2 respectively, with k_1gtk_2 . Find: (a) the force of interaction of the bars in the process of motion, (b) the minimum value of the angle alpha at which at bars start sliding down.