A  6.8kg block is being pushed up a frictionless plane inclined at  35o to the horizontal. (a) Calculate the work done by the normal force (b) Calculate the work done by the gravitational force as the block moves  3.6m along an axis parallel to the inclined plane.

A 2 kg block is pushed 4.0 m along a horizontal floor by a force of magnitude 25 N at an angle θ=30.0° with the horizontal. The coefficient of kinetic friction between the block and the floor is 0.35. Calculate the magnitudes of (a) the work done by the applied force, (b) the work done by friction force, (c) the work done by the normal force, (d) the work done by gravity, (e) the change in kinetic energy of the block.cos30o =sin60o=0.866 cos60o =sin30o=0.500 g=9.8 m/s2

A 58.1-kg skateboarder starts out with a speed of 2.03 m/s. He does 108 J of work on himself by pushing with his feet against the ground. In addition, friction does -243 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the skateboarder is 7.89 m/s. (a) Calculate the change (PEf - PE0) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Give the absolute value.

A man drags a table 3.75 m across the floor, exerting a constant force of 46.0 N, directed 29.0° above the horizontal. (a) Find the work done by the applied force.(b) How much work is done by friction? Assume the table's velocity is constant.

An elevator having a mass of 585 kg is raised a distance of 32 m. Determine the work done, neglecting frictional effects and the work required for acceleration.

A 3.8kg box is raised from rest a distance 8.4m by an upward applied force of 7.8N. Find the work done by gravity on the box. Give the numerical value only and include sign if applicable.

A man pushes a m = 4.00 kg bin a distance d = 3.40 m along the floor by a constant force of magnitude F = 16.0N directed at an angle 6 = 30.0° below the horizontal as shown in the figure. Assume the floor is frictionless. (Enter your answers in joules.) m (a) Determine the work done on the bin by the applied force (the force on the bin exerted by the man). (b) Determine the work done on the bin by the normal force exerted by the floor. (c) Determine the work done on the bin by the gravitational force. (d) Determine the work done by the net force on the bin.