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(a) How high (in m) a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 90.0 km/h? (Enter a number.) 31.88 m (b) If, in actuality, a 750 kg car with an initial speed of 90.0 km/h is observed to coast up a hill to a height 17.0 m above its starting point, how much thermal energy (in J) was generated by friction? (Enter a number.) 109425 (c) What is the average force of friction (down the slope) if the hill has a slope 2.5° above the horizontal? (Enter your answer in N. Enter a number.) 296.55

(a) How high (in m) a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 90.0 km/h? (Enter a number.) 31.88 m (b) If, in actuality, a 750 kg car with an initial speed of 90.0 km/h is observed to coast up a hill to a height 17.0 m above its starting point, how much thermal energy (in J) was generated by friction? (Enter a number.) 109425 (c) What is the average force of friction (down the slope) if the hill has a slope 2.5° above the horizontal? (Enter your answer in N. Enter a number.) 296.55

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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### Physics Problem: Car Coasting Up a Hill This educational section explores the physics of a car coasting up a hill under various conditions. The problems relate to calculations of height, energy, and force of friction. #### Problem (a) **Question:** How high (in meters) a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 90.0 km/h? **Given Answer:** ``` 31.88 ✔️ m ``` #### Problem (b) **Question:** If, in actuality, a 750 kg car with an initial speed of 90.0 km/h is observed to coast up a hill to a height of 17.0 m above its starting point, how much thermal energy (in J) was generated by friction? **Given Answer:** ``` 109425 ✔️ J ``` #### Problem (c) **Question:** What is the average force of friction (down the slope) if the hill has a slope 2.5° above the horizontal? (Enter your answer in N. Enter a number.) **Given Answer:** ``` 296.55 ❌ N ``` ### Explanation of Graphs/Diagrams There are no graphs or diagrams provided in the image to explain. --- This information serves to guide students in solving physics problems related to energy conservation, friction, and motion.
Transcribed Image Text:### Physics Problem: Car Coasting Up a Hill This educational section explores the physics of a car coasting up a hill under various conditions. The problems relate to calculations of height, energy, and force of friction. #### Problem (a) **Question:** How high (in meters) a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 90.0 km/h? **Given Answer:** ``` 31.88 ✔️ m ``` #### Problem (b) **Question:** If, in actuality, a 750 kg car with an initial speed of 90.0 km/h is observed to coast up a hill to a height of 17.0 m above its starting point, how much thermal energy (in J) was generated by friction? **Given Answer:** ``` 109425 ✔️ J ``` #### Problem (c) **Question:** What is the average force of friction (down the slope) if the hill has a slope 2.5° above the horizontal? (Enter your answer in N. Enter a number.) **Given Answer:** ``` 296.55 ❌ N ``` ### Explanation of Graphs/Diagrams There are no graphs or diagrams provided in the image to explain. --- This information serves to guide students in solving physics problems related to energy conservation, friction, and motion.
### Physics Problem Set on Motion and Energy 1. **Hill Coasting Problem Set** (a) **Calculation of Height Without Friction** - **Problem Statement:** How high (in m) can a car coast up (engine disengaged) if friction is negligible and its initial speed is 90.0 km/h? (Enter a number.) - **Answer:** 31.88 m (b) **Thermal Energy Due to Friction** - **Problem Statement:** If, in actuality, a 750 kg car with an initial speed of 90.0 km/h is observed to coast up a hill to a height 17.0 m above its starting point, how much thermal energy (in J) was generated by friction? (Enter a number.) - **Answer:** 109425 J (c) **Average Force of Friction Calculation** - **Problem Statement:** What is the average force of friction (down the slope) if the hill has a slope 2.5° above the horizontal? (Enter your answer in N. Enter a number) - **Answer:** 354.12 N *Note: The answers provided for each sub-question in this problem set have validation symbols. A green check mark (✔) indicates a correct answer, while a red cross (✘) indicates an incorrect answer.*
Transcribed Image Text:### Physics Problem Set on Motion and Energy 1. **Hill Coasting Problem Set** (a) **Calculation of Height Without Friction** - **Problem Statement:** How high (in m) can a car coast up (engine disengaged) if friction is negligible and its initial speed is 90.0 km/h? (Enter a number.) - **Answer:** 31.88 m (b) **Thermal Energy Due to Friction** - **Problem Statement:** If, in actuality, a 750 kg car with an initial speed of 90.0 km/h is observed to coast up a hill to a height 17.0 m above its starting point, how much thermal energy (in J) was generated by friction? (Enter a number.) - **Answer:** 109425 J (c) **Average Force of Friction Calculation** - **Problem Statement:** What is the average force of friction (down the slope) if the hill has a slope 2.5° above the horizontal? (Enter your answer in N. Enter a number) - **Answer:** 354.12 N *Note: The answers provided for each sub-question in this problem set have validation symbols. A green check mark (✔) indicates a correct answer, while a red cross (✘) indicates an incorrect answer.*
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