O A 67-kg skateboarder grinds down a hubba ledge that is 2.3 m long and inclined at 15 • below the horizontal. Kinetic friction dissipates half of her initial potential energy to thermal and sound energies. Part A What is the coefficient of kinetic friction between her skateboard and the ledge surface? 1
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- A crate with mass m = 33.3 kg being pushed up an incline that makes an angle φ = 22.7 degrees with horizontal. The pushing force is horizontal, with magnitude P, and the coefficient of kinetic friction between the crate and the incline is μ = 0.358. Consider the work done on the crate as it moves a distance d = 5.32 m at constant speed. a. What is work done by the pushing force, in joules? b. What is the work done by friction, in joules? c. What is the work done by gravity, in joules? d. What is the net work, in joules?Problem 1 A 1-kg block is 3 meters from a light spring. The coefficient of kinetic friction between the floor and the block is 0.25 (the coefficient of friction is the same on the entire surface). The block has a speed of 3 m/s when it hits the spring that has a force constant of 50 N/m. The block comes to rest when it has compressed the spring a maximum distance d. Find: 1. The speed of the object at the beginning of the 3 meters. 2. The value of the maximum compression d. k mH, Please explain and answer this question for me:thank you! Why does the shape of the ramp not affect the Total Energy in the non-friction case and Why does the shape of the ramp affect the Total Energy in the friction case?
- Part A A 45 kg softball player slides into second base, generating 350 J of thermal energy in her legs and the ground. How fast was she running? Express your answer with the appropriate units. HẢ Value Units Submit Request Answer Provide FeedbackA 79 kg bike racer climbs a 1400-m-long section of road that has a slope of 4.3° Part A By how much does his gravitational potential energy change during this climb? Express your answer with the appropriate units. AU = O μÅ Value 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
- HelpConsider a system of a cliff diver and the earth. The gravitational potential energy of the system decreases by 23,000 J as the diver drops to the water from a height of 44.0 m. Determine her weight in newtons. NA 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.