A block with a mass of 47.0 kg is pushed with a horizontal force of 150 N. The block moves at a constant speed across a level, rough surface a distance of 5.65 m. (a) What is the work done (in J) by the 150 N force? J (b) What is the coefficient of kinetic friction between the block and the surface?

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A crate with a mass of 46.0 kg is pushed with a horizontal force of 150 N. The crate moves at a constant speed across a level, rough plane a distance of 5.50 m. (a) What is the work done (in J) by the 150 N force? J (b) What is the coefficient of kinetic friction between the crate and the plane?

A 156-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 29.1° below the horizontal. The coefficient of kinetic friction is 0.244. What should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero?

A tension force of 165 N inclined at 25.0° above the horizontal is used to pull a 39.0 kg storage crate a distance of 4.10 m on a rough surface. If the crate moves at a constant speed, find (a) the work done by the tension force and (b) the coefficient of kinetic friction between the crate and surface. (a) the work done by the tension force (in J)   (b) the coefficient of kinetic friction between the crate and surface

A 100 kg crate is being pushed across a horizontal floor by a force that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.2. What should be the magnitude of the force, so that the net work done by it and the kinetic frictional force is zero?

A person pushes a 15.3-kg shopping cart at a constant velocity for a distance of 36.2 m on a flat horizontal surface. She pushes in a direction 21.8 ° below the horizontal. A 50.5-N frictional force opposes the motion of the cart. (a) What is the magnitude of the force that the shopper exerts? Determine the work done by (b) the pushing force, (c) the frictional force, and (d) the gravitational force.

Starting from rest, a 5.50-kg block slides 2.40 m down a rough 30.0° incline. The coefficient of kinetic friction between the block and the incline is  ?k = 0.436.   (a) Determine the work done by the force of gravity.(b) Determine the work done by the friction force between block and incline.(c) Determine the work done by the normal force.(d) Qualitatively, how would the answers change if a shorter ramp at a steeper angle were used to span the same vertical height?

A force given by (6i – 3j) N acts on an object experiencing a displacement given by (3i – j) m.  Determine the work done by the force.

A force of constant magnitude pushes a box up a vertical surface as shown in the figure. The box moves at a constant speed. If the mass of the box is 3.70 kg, it is pushed 3.60 m vertically upward, the coefficient of friction is 0.350 and the angle ? is 30.0°, determine the following. (a) work done on the box by F J(b) work done on the box by the force of gravity J(c) work done on the box by the normal force J(d) increase in gravitational potential energy of the box as it moves up the wall J