Number 3 W: GPE, KEN- mgh - 2mu?Name:Period:Igal.HDate:Conservation of EnergyDirections: Read each of the following statements/questions. Answer them correctly and box your final answer.A large chuck of ice with mass 15.0-kg falls from a roof 8.00 m above the ground.Find the kinetic energy of the ice when it reaches the ground.a.KE - (15)( 9.8)(8)=1176 JGPE= KEh: -8b. What is the speed of the ice when it reaches the ground?2KE =nv?2v? 2 KE(12.57 )1 (176J).52m/s15K92.A bike rider approaches a hill with a speed of 8.50 m/s. The total mass of the bike and rider is 85-kgFind the kinetic energy of the bike and rider.a.7850)(8.5)07o,6 Jb. The rider coast up the hill. Assuming there is no friction; at what height will the bike come to astop? KE h307o76mg354 J(85)(9.8)c. Does your answer depend on the mass of the bike and rider? Explain.Tarzan, mass 85-kg, swings down from a tree limb on the end of a 20 m vine. His feet touch the ground4.0 m below the limb.How fast is Tarzan moving when he reaches the ground?a.b. Does your answer depend on Tarzan's mass?c.Does your answer depend on the length of the vine?4. A skier starts from rest at the top of a 45.0 m hill; skies down a 30.0° incline into a valley, and continuesup a 40 m hill. Both hill heights are measured from the valley floor. Assume you can neglect friction andthe effects of ski poles.a. How fast is the skier moving at the bottom of the valley?b. What is the skier's speed at the top of the next hill?

Name: Number 3 W: GPE, KEN- mgh - 2mu?Name:Period:Igal.HDate:Conservation of
Uploaded: 2024-03-20T06:57:37.000Z
Channel: Bartleby
Description: Number 3 W: GPE, KEN- mgh - 2mu?Name:Period:Igal.HDate:Conservation of EnergyDirections: Read each of the following statements/questions. Answer them correctly and box your final answer.A large chuck of ice with mass 15.0-kg falls from a roof 8.00 m

3. Given: mass m =85 kgheight from grounf h=4mlength of vine L=20m

Science

Physics

3. Tarzan, mass 85-kg, swings down from a tree limb on the end of a 20 m vine. His feet touch the grol 4.0 m below the limb. a. How fast is Tarzan moving when he reaches the ground? b. Does your answer depend on Tarzan's mass? c. Does your answer depend on the length of the vine?

3. Tarzan, mass 85-kg, swings down from a tree limb on the end of a 20 m vine. His feet touch the grol 4.0 m below the limb. a. How fast is Tarzan moving when he reaches the ground? b. Does your answer depend on Tarzan's mass? c. Does your answer depend on the length of the vine?

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter8: Conservation Of Energy

Section: Chapter Questions

Problem 8.10CQ: In Chapter 7, the work-kinetic energy theorem, W = K, was introduced. This equation states that work...

See similar textbooks

Similar questions

(a) How fast must a 3000-kg elephant move to have the same kinetic energy as a 65.0-kg sprinter running at 10.0 m/s? (b) Discuss how the larger energies needed for the movement of larger animals would relate to metabolic rates.
Ignoring details associated with friction, extra forces exerted by arm and leg muscles, and other factors, we can consider a pole vault as the conversion of an athlete’s running kinetic energy to gravitational potential energy. If an athlete is to lift his body 4.8 m during a vault, what speed must he have when he plants his pole?
Give an example of something we think of as work in everyday circumstances that is not work in the scientific sense. Is energy transferred or changed in form in your example? If so, explain how this is accomplished without doing work.
If you hold this textbook out at shoulder height and let go, at the instant you let go, does the book have potential energy? Kinetic energy?
A 500-kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is its average power output in watts and horsepower if this takes 7.30s?
Integrated Concepts A 105-kg basketball player crouches down 0.400 m while waiting to jump. After exerting a force on the floor through this 0.400 m, his feet leave the floor and his center of gravity rises 0.950 m above its normal standing erect position. (a) Using energy considerations, calculate his velocity when he leaves the floor. (b) What average force did he exert on the floor? (Do not neglect the force to support his weight as well as that to accelerate him.) (c) What was his power output during the acceleration phase?
Using energy considerations, calculate the average force a 60.0-kg sprinter exerts backward on the track to accelerate from 2.00 to 8.00 m/s in a distance of 25.0 m, if he encounters a headwind that exerts an average force of 30.0 N against him.
What does work on a shuffleboard puck as it slides to rest? Why is the board dusted, and how does this affect work?
Give an example of something think of as work in everyday circumstances that is not work in the scientific sense. Is energy transferred or changed in form in your example? If so, explain how this without doing work.
A 100 — kg man is skiing across level ground at a speed of 8.0 m/s when he comes to the small slope 1.8 m higher than ground level shown in the following figure. (a) If the skier coasts up the bill, what is his speed when he reaches the top plateau? Assume friction between the snow and skis is negligible. (b) What is his speed when he reaches the upper level if an 80 — N frictional force acts on the skis?
Check Your Understanding What potential energy U(x) can you substitute in Equation 8.13 that will result in motion with constant velocity of 2 m/s for a particle of mass 1 kg and mechanical energy 1 J?
A person drops a pebble of mass m1from a height h, and it hits the floor with kinetic energy K. The person drops another pebble of mass m2, from a height of 2h , and it hits the floor with the same kinetic energy K. How do the masses of the pebbles compare?