In the figure below, a constant external force P = 160 N is applied to a 20-kg box, which is on a rough horizontal surface. 30° 20 kg -8.0 m- The force pushes the box a distance of 8.0 m, in a time interval of 4.0 s, and the speed changes from V₁ = 0.5 m/s to v₂ = 2.6 m/s. What is the work done on the box by friction? Express your answer in joules. plz use g = 9.8

In the figure, a constant external force P = 300 N is applied to a 20.0 kg box, which is on a rough horizontal surface. While the force pushes the box a distance of 8.00 m, the speed changes from 0.500 m/s to 2.60 m/s. The work done by friction during this process is closest to P 30° 20 kg -8.0 m O A. +2209 J ОВ.-1948 J OC.-2013 J O D.+1948 J O E. +2013 J

A 325 N force is pulling on an 85.0 kg refrigerator as it slides across a horizontal floor. The force acts at an angle of 25.0° above the horizontal surface of the floor. The coefficient of kinetic friction between the refrigerator and the floor is 0.150, and the refrigerator moves a distance of 5.50 m. Find (a) the work done by the pulling force, (b) the work done by the force of kinetic friction, (c) the net amount of work done on the refrigerator, and (d) if the refrigerator was initially at rest determine the speed of the refrigerator after the 5.50m displacement. (e) Include a force (or free-body) diagram of the situation. ]

A car is parked on a hill. The gravitational force on the car is 9.31 x 103 N straight downward, and the angle of the hill is 4° from the horizontal. The car’s brakes fail, and the car slides 30.0 m downhill. a) Calculate the component of the gravitational force that acts parallel to the car’s motion.  b) Calculate the work done on the car by gravity as the car slides.

A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. A 73.5-kg water-skier has an initial speed of 5.2 m/s. Later, the speed increases to 12.2 m/s. Determine the work done by the net external force acting on the skier. W =

3. A block of mass m is moved over a distance d. An applied force F is directed perpendicularly to the block's displacement. How much work is done on the block by the force F? m

2. An ocean diver swims upwards against the drag force exerted by the water. This force varies in magnitude by depth (d) and is given by F(d)=√d, where y=100 N/m ¹/2. If the diver ascends from a depth of d=10m to the surface (d=0), what is the work done by this drag force? Why is this work negative?

A 1350-kg car is traveling with an initial speed of 25.0 m/s. Determine the car's speed after -2.20 × 10° J of net work is done on the car. X m/s

A 0.59-kg particle has a speed of 5.0 m/s at point A and kinetic energy of 8.5 J at point B. (a) What is its kinetic energy at A? J(b) What is its speed at point B? m/s(c) What is the total work done on the particle as it moves from A to B? J

Starting from rest, a 6.6-kg block slides 3.3 m down a rough 36-degree incline. The coefficient of kinetic friction between the block and the incline is μk = 0.49.  Determine the net work done on the block.