Farmer Johnson hitches his tractor to a sled loaded with firewood and pulls it a distance of 45.24 m along level frozen ground. The total weight of sled and load is 15554.38 N. The tractor exerts a con stant force with magnitude 5541.10 N at an angle of 36.9 degrees above the horizontal. A constant 3744.53 N friction force opposes the motion. Find the total work done on the sled by all the forces (J).

A 6.00-kg dictionary is push up a frictionless ramp inclined upward at 30.0° above the horizontal. It is pushed 2.00 m along the incline by a constant 100-N force parallel to the ramp. If the dictionary's speed at the bottom is 1.60 m/s, What is the speed at the top? Use energy methods. And show fbd.

a 2.5 kg mass is intially at reston a horizontal surface. an applied force acts in the +x direction resulting in a displacement of 1.50 m. if the speed of the mass is 4.00 m at the 150 m mark and the applied force is 22.0 N what amount of work was done by friction?

11. A 5kg block is pushed up a 40° incline at constant velocity of 3m/s. The force pushing on the blockacts parallel to the incline, and has a magnitude of 47.5N. (a) What is the magnitude of the normal forceacting on the block? (b) What is the magnitude of the frictional force? (c) Calculate the coefficient offriction. (d) How much work is done by the normal force? (e) How much work is done by the force offriction after 4 seconds have elapsed? (f) What is the net work done on the block?

Several children are on a sled pulled by a four-wheeler across a level snow-covered field. The sled is moving at a constant speed of 9.05 m/s, and the tow rope (parallel to the ground) makes an angle of 35.0°, with respect to the velocity of the sled (see the figure below). 35.0 If the tension in the rope is 49.0 N, determine the work done (in J) on the sled by the tension in the rope in 11.5 s. Additional Materials O Reading

An owner tries to move their sleepy dog by pulling him across the floor. The dog slides across the floor for 0.50m at a constant speed while his owner puts a force of 107.5N at an angle of 700 on him. The dog weighs 147N and a 37N friction force acts between him and the floor. The Free Body Diagram is provided.  In the table, calculate the work done by each of the forces in sliding the dog.  fill in chart

An applied force of 20 N i pushes an object that is initially at rest over a horizontal surface. The coefficient of kinetic friction is 0.450 and the mass is 1.4 kg. If the net work done at some point is 60.6 J, what is the object's speed at that point?

A 20.0-kg crate sits at rest at the bottom of a15.0-m-long ramp that is inclined at above the horizontal. Aconstant horizontal force of 290 N is applied to the crate to push itup the ramp. While the crate is moving, the ramp exerts a constantfrictional force on it that has magnitude 65.0 N. (a) What is thetotal work done on the crate during its motion from the bottom tothe top of the ramp? (b) How much time does it take the crate totravel to the top of the ramp?

tolerance is 3 sig figs

A 68.3-kg skier coasts up a snow-covered hill that makes an angle of 25.5 ° with the horizontal. The initial speed of the skier is 9.77 m/s. After coasting a distance of 1.45 m up the slope, the speed of the skier is 3.60 m/s. (a) Find the work done by the kinetic frictional force that acts on the skis. (b) What is the magnitude of the kinetic frictional force? (a) Number i (b) Number i Units Units 0