College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
Bartleby Related Questions Icon

Related questions

bartleby

Concept explainers

Question

I need question 5 answered. 

### Physics Problems: Friction and Force 

**1. Piano Movement on Flat Ground**
- **Object**: 80 kg piano
- **Coefficients of friction**: Kinetic (μ_k) = 0.2, Static (μ_s) = 0.4

   a. **Weight of Piano**: 
      - Answer: 784 N

   b. **Force to Start Movement**: 
      - Answer: 312 N

   c. **Force for Constant Velocity**: 
      - Answer: 156.8 N

   d. **Force for Acceleration (5 m/s²)**: 
      - Answer: 278.8 N

**2. Box on Concrete Ground**
- **Object**: 120 kg box
- **Force applied**: 800 N
- **Coefficients of friction**: Kinetic (μ_k) = 0.8, Static (μ_s) = 0.5

   - **Question**: Can the workers move the box?
     - Answer: No, they need a force of 940.8 N to begin moving the box.

**3. Object on Inclined Plane**
- **Mass**: 65 kg
- **Incline angle**: 25°
- **Force applied**: 35 N
- **Acceleration**: 2.5 m/s²

   - **Question**: What is the kinetic friction (μ_k) between the object and the plane?
     - Answer: μ_k = 0.31

**4. Person Sliding Down Hill**
- **Mass**: 76 kg
- **Incline angle**: 50°
- **Coefficient of friction**: μ_k = 0.1

   - **Question**: Speed after 2 seconds?
     - Answer: 72.6 m/s²

**5. Truck on Hill**
- **Weight of truck**: 700,000 N
- **Incline angle**: 50°

   - **Task**: Calculate the perpendicular force component.
     - Answer: 449,645.1 N

**Diagram Explanation (Problem 4)**
- **Inclined Plane Diagram**: A triangle representing the slope, with forces depicted:
  - mgsinθ (down the slope)
  - mgcosθ (perpendicular to the slope)
  - Friction (opposing the
expand button
Transcribed Image Text:### Physics Problems: Friction and Force **1. Piano Movement on Flat Ground** - **Object**: 80 kg piano - **Coefficients of friction**: Kinetic (μ_k) = 0.2, Static (μ_s) = 0.4 a. **Weight of Piano**: - Answer: 784 N b. **Force to Start Movement**: - Answer: 312 N c. **Force for Constant Velocity**: - Answer: 156.8 N d. **Force for Acceleration (5 m/s²)**: - Answer: 278.8 N **2. Box on Concrete Ground** - **Object**: 120 kg box - **Force applied**: 800 N - **Coefficients of friction**: Kinetic (μ_k) = 0.8, Static (μ_s) = 0.5 - **Question**: Can the workers move the box? - Answer: No, they need a force of 940.8 N to begin moving the box. **3. Object on Inclined Plane** - **Mass**: 65 kg - **Incline angle**: 25° - **Force applied**: 35 N - **Acceleration**: 2.5 m/s² - **Question**: What is the kinetic friction (μ_k) between the object and the plane? - Answer: μ_k = 0.31 **4. Person Sliding Down Hill** - **Mass**: 76 kg - **Incline angle**: 50° - **Coefficient of friction**: μ_k = 0.1 - **Question**: Speed after 2 seconds? - Answer: 72.6 m/s² **5. Truck on Hill** - **Weight of truck**: 700,000 N - **Incline angle**: 50° - **Task**: Calculate the perpendicular force component. - Answer: 449,645.1 N **Diagram Explanation (Problem 4)** - **Inclined Plane Diagram**: A triangle representing the slope, with forces depicted: - mgsinθ (down the slope) - mgcosθ (perpendicular to the slope) - Friction (opposing the
Expert Solution
Check Mark
Knowledge Booster
Background pattern image
Physics
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Text book image
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Text book image
University Physics (14th Edition)
Physics
ISBN:9780133969290
Author:Hugh D. Young, Roger A. Freedman
Publisher:PEARSON
Text book image
Introduction To Quantum Mechanics
Physics
ISBN:9781107189638
Author:Griffiths, David J., Schroeter, Darrell F.
Publisher:Cambridge University Press
Text book image
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Text book image
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:9780321820464
Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:Addison-Wesley
Text book image
College Physics: A Strategic Approach (4th Editio...
Physics
ISBN:9780134609034
Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:PEARSON