If the coefficient of kinetic friction is 0.21, how much work do you do when you slide a `50 – kg` box at constant speed across a `4.8-m` wide room ?

Block A weights 4 N and block B weights 8 N. The coefficient of kinetic friction is 0.25 for all surfaces. The force F to slide B at a constant speed, when A rests on B and moves with it, is

A horizontal force of magnitude 41.0 N pushes a block of mass 4.00 kg across a floor where the coefficient of kinetic friction is 0.600. (a) How much work is done by that applied force on the block-floor system when the block slides through a displacement of 2.00 m across the floor ? (b) During that displacement, the thermal energy of the block increases by 40.0 J. What is the increase in thermal energy of the floor ? (c) What is the increase in the kinetic energy of the block ?

A 55-kg box is being pushed a distance of 7.0 m across the floor by a force vec(p) whose magnitude is 150 N. The force vec(P) is parallel to the displacement of the box. The coefficient of kinetic friction is 0.25. Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work done by each force. ( The four forces and the force P, the frictional force f, the normal force N, and the force due to gravity mg. )

A horizontal force F pulls a 20 kg box at a constant speed along a horizontal floor. If the coefficient of friction between the box and the floor is 0.25,how much work is done by the force F in moving the box through a distance of 2 m?

A factory worker pushes a 25.0 kg crate downward at an angle of 30^(@) below the horizontal a distance of 6.0 m along a level floor. (a) What magnitude of force must the worker apply to move the crate at constant velocity, if the coefficient of kinetic friction between the crate and floor is 0.3 ? (b) How much work is done on the crate by this force when the crate is pushed a distance of 6.0 m? (c) How much work is done on the crate by friction during this displacement ? (d) How much work is done by the normal force and by gracity ? (e) What is the total work done on the crate ? Take g=10m//s^(2)

A block of mass m sliding down an inclined at constant speed is initial at a height h shown the ground as shown in the figure above . The coefficient of kinetic friction between the mass and the inclined is mu . If the mass constinues to slide down the inclined at a constant speed how much energy is displaced by friction by the time the mass reaches the bottom of the incline?

A block of mass 1 kg slides down on a rough inclined plane of inclination 60^(@) starting from its top. If the coefficient of kinetic friction is 0.5 and length of the plane is 1 m , then work done against friction is (Take g=9.8m//s^(2) )

A worker pushed a 23 kg block 8.4 m along a level floor at constant speed with a force directed 32^(@) below the horizontal . If the coefficient of kinetic friction between block and floor was 0.20, what were (a) the work done by the worker's force and (b) the increase in thermal energy of the block-floor system ?

How much work does a boy of mass 50kg do when he climbs a height 30 metre.