A 25 kg air compressor is dragged up a rough incline from 1 = (1.3; +1.3;) m to ř2 = (8.3i +2.6j) m, where the y-axis is verticai. Part A How much work does gravity do on the compressor during this displacement? Express your answer with the appropriate units. W = Value Units

Part A What is the minimum work needed to push a 900-kg car 860 m up along a 9.5° incline? Ignore friction. Express your answer with the appropriate units. WP = µÅ Value Units ?

Part A How much work must you do to push a 12.0 kg block of steel across a steel table (k = 0.60) at a steady speed of 1.20 m/s for 1.90 s? Express your answer with the appropriate units. ► View Available Hint(s) W push = Submit Part B O Value μA What is your power output while doing so? Express your answer with the appropriate units. ► View Available Hint(s) μA P = Value Units Units ? ?

▼ Part A How much work must you do to push a 10.0 kg block of steel across a steel table (uk = 0.60) at a steady speed of 1.20 m/s for 5.20 s? Express your answer with the appropriate units. View Available Hint(s) Wp push = Submit Part B P = Submit Value What is your power output while doing so? Express your answer with the appropriate units. ► View Available Hint(s) HÅ μÅ Value Units Units ? ?

A process occurs in which a system's potential energy decreases while the system does work on the environment. Does the system's kinetic energy increase, decrease, or stay the same? Or is there not enough information to tell? Explain. Match the words in the left column to the appropriate blanks in the sentences on the right. positive negative zero unknown ‒‒‒‒‒‒‒‒‒‒ only the potential energy does the work the system does work on the environment Submit the mechanical energy does not change the change in potential energy may be greater as well as less than the work the system does on the environment the body cannot do more work than the change of its potential energy Request Answer The change in kinetic energy is because Reset Help

(Figure 1) is the force-versus-position graph for a particle moving along the x-axis. Figure Fx (N) 4 2 0 -2 -4 1 2 3 -x (m) ▼ Part A Determine the work done on the particle during the interval 0-1 m. Express your answer with the appropriate units. Wo-1 = Units You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Part B ΠΑ W1-2 = Submit Value Previous Answers Request Answer Determine the work done on the particle during the interval 1-2 m. Express your answer with the appropriate units. μA Value Units ? www Previous Answers Request Answer ? Units input for part B

A 20.0-kg child descends a slide 1.80 m high and reaches the bottom with a speed of 1.25 m/s . Part A How much thermal energy due to friction was generated in this process? Express your answer to three significant figures and include the appropriate units.

You are on vacation in San Francisco and decide to take a cable car to see the city. A 5800-kg cable car goes 460 m up a hill inclined 13° above the horizontal. The system is the car and Earth. Part A Determine the change in the total energy of the system when the car moves from the bottom to the top. Ignore friction. Express your answer with the appropriate units.

A 45 g bug is hovering in the air. A gust of wind exerts a force F = (4.0î - 6.0ĵ) × 10-² N on the bug. Part A How much work is done by the wind as the bug undergoes displacement A7 = (7.02- 7.03) m? Express your answer with the appropriate units. W = Submit Part B V= HÅ Value Submit X Incorrect; Try Again; 9 attempts remaining Provide Feedback Value Units Previous Answers Request Answer What is the bug's speed at the end of this displacement? Assume that the speed is due entirely to the wind. Express your answer with the appropriate units. μA Request Answer P Units input for part A ? Units P ?

Part A A 1680 kg car skids on a level road with coefficient of kinetic friction 0.64 between the tires of the car and the road. The car skids a distance of 102 m and comes to a complete stop. The work done on the car by the force of kinetic friction is (enter your answer with two significant figures) possibly useful: W = (Fcose)d w = mg 9 = 9.81 m/s? VAZ中 ? J Submit Request Answer Part B The amount of thermal energy generated while the car was skidding is (enter your answer with two significant figures) AL中 ? J Submit Request Answer