College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 3, Problem 49GP
** EST You are doing squats on a bathroom scale. You decide to push off the scale and jump up. Estimate the reading as you push off and as you land. Indicate any assumptions you made.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Problem 1
A motorcyclist wants to perform the “Wall of Death” stunt. In this stunt, the rider will drive a motorcycle around the inside of a circular, vertical wall (you can see examples of
this on YouTube if you search for “motorcycle stunt wall of death”). If the rider moves too
slowly, then friction will not be large enough to oppose gravity and keep the motorcycle from
falling. Let’s do som calculations to help the rider out.
(A) Draw a free body diagram of the motorcycle and rider while they are moving around
the vertical wall.
(B) For this particular stunt, the radius of the wall is r = 5.0 m, and the rider wants to go
at a constant v = 14 m/s. What will the rider’s centripetal acceleration be?
(C) How much larger is this than g, the accerelation due to gravity near the surface of
Earth?
Question 1 - A light block of mass m and a heavy block of mass M are attached to the
ends of a rope. A student holds the heavier block and lets the lighter block hang below
it, as shown in the figure. Then she lets go. Air resistance can be neglected.
A. What is the tension in the rope while the blocks are being held? Explain.
M
A car is approaching a wall at a speed of 27.1 m/s. If the distance d is 100 m,
a. Determine the friction coefficient required to stop the car before it hits the wall.
b. Determine the friction coefficient necessary for the car to avoid the wall by turning (not braking) and following the circular path shown. (friction supplies the centripetal force)
Chapter 3 Solutions
College Physics
Ch. 3 - Review Question 3.1 How do we determine how many...Ch. 3 - Review Question 3.2 A book bag hanging from a...Ch. 3 - Review Question 3.3 An elevator in a tall office...Ch. 3 - Review Question 3.4 What is the main difference...Ch. 3 - Review Question 3.5 Your friend says that m is a...Ch. 3 - Review Question 3.6 Newton’s second law says that...Ch. 3 - Review Question 3.7 Three friends argue about the...Ch. 3 - Review Question 3.8 Is the following sentence...Ch. 3 - Review Question 3.9 Explain how an air bag and...Ch. 3 - An upward-moving elevator slows to a stop as it...
Ch. 3 - You apply the brakes of your car abruptly and your...Ch. 3 - Which of the statements below explains why a child...Ch. 3 - Which observers can explain the phenomenon of...Ch. 3 - 5. Which vector quantities describing a moving...Ch. 3 - You have probably observed that magnets attract...Ch. 3 - Which of the following velocity-versus-time graphs...Ch. 3 - A book sits on a tabletop. What force is the...Ch. 3 - 9. A spaceship moves in outer space. What happens...Ch. 3 - 10. A 0.10-kg apple falls on Earth, whose mass is...Ch. 3 - 11. A man stands on a scale and holds a heavy...Ch. 3 - You stand on a bathroom scale in a moving...Ch. 3 - A person pushes a 10-kg crate, exerting a 200-N...Ch. 3 - Two small balls of the same material, one of mass...Ch. 3 - 15. A box full of lead and a box of the same size...Ch. 3 -
16. Figure Q3.16 shows an unlabeled force...Ch. 3 - A person jumps from a wall and lands stiff-legged....Ch. 3 - A 3000-kg spaceship is moving away from a space...Ch. 3 - Figure Q3.19 is a velocity-versus-time graph for...Ch. 3 - 20. Explain the purpose of crumple zones, that is,...Ch. 3 - 21. Explain why when landing on a firm surface...Ch. 3 - A small car bumps into a large truck. Compare the...Ch. 3 - 23. You are pulling a sled. Compare the forces...Ch. 3 - 25. You are holding a 100-g apple. (a) What is the...Ch. 3 - 26. You throw a 100-g apple upward. (a) While the...Ch. 3 - After having been thrown upward, a 100-g apple...Ch. 3 - * In Figure P3.1 you see unlabeled force diagrams...Ch. 3 - 2. Draw a force diagram (a) for a bag hanging at...Ch. 3 - 3. For each of the following situations, draw the...Ch. 3 - 4. You hang a book bag on a spring scale and place...Ch. 3 - 5. A block of dry ice slides at constant velocity...Ch. 3 - 6. * You throw a ball upward. (a) Draw a motion...Ch. 3 - 7. A string pulls horizontally on a cart so that...Ch. 3 - 8. * Solving the previous problem, your friend...Ch. 3 - 9. * A string pulls horizontally on a cart so that...Ch. 3 - A block of dry ice slides at a constant velocity...Ch. 3 - 11 .Three motion diagrams for a moving elevator...Ch. 3 - 12. * A student holds a thin aluminum pie pan...Ch. 3 - * Figures P3.11a b, and c show three motion...Ch. 3 - 14. * A train traveling from New York to...Ch. 3 - *Explain the phenomenon of whiplash from two...Ch. 3 - An astronaut exerts a 100-N force pushing a beam...Ch. 3 - 17. Four people participate in a rope competition....Ch. 3 - 18. * Shot put throw During a practice shot put...Ch. 3 - * You know the sum of the forces F exerted on an...Ch. 3 - * You record the displacement of an object as a...Ch. 3 - 25. * Spider-Man Spider-Man holds the bottom of an...Ch. 3 - ** Matt is wearing Rollerblades. Beth pushes him...Ch. 3 - 27. * Stuntwoman The downward acceleration of a...Ch. 3 - EST Estimate the average force that a baseball...Ch. 3 - * Super Hornet jet takeoff A2.1104-kgF-18 Super...Ch. 3 - Lunar Lander The Lunar Lander of mass 2.01024 kg...Ch. 3 - 31. Aisha throws a ball upward Frances, standing...Ch. 3 - Students Lucia. Isabel, and Austin are...Ch. 3 - 33. * Astronaut Karen Nyberg, a 60-kg astronaut,...Ch. 3 - * A 0.10-kg apple falls off a tree branch that is...Ch. 3 - 35. ** An 80-kg fireman slides 5.0 m down a fire...Ch. 3 - * Earth exerts a 1.0-N gravitational force on an...Ch. 3 - * You push a bowling ball down the lane toward the...Ch. 3 - 38. * EST (a) A 50-kg skater initially at rest...Ch. 3 - 39. ** EST Basketball player LeBron James can jump...Ch. 3 - * EST The Scottish Tug of War Association contests...Ch. 3 - Consider the experiment described in Question 3.6...Ch. 3 - 42. * EST A friend drops a 0.625-kg basketball...Ch. 3 - 43 Car safety The National Transportation Safety...Ch. 3 - 44. * A 70-kg person in a moving car stops during...Ch. 3 - BIOESTLeft ventricle pumpingThe lower left chamber...Ch. 3 - Prob. 46GPCh. 3 - 47. ** EST Olympic dive During a practice dive,...Ch. 3 - 49. ** EST You are doing squats on a bathroom...Ch. 3 - ** EST Estimate the horizontal speed of the runner...Ch. 3 - 51. ** EST Estimate the maximum acceleration of...Ch. 3 - ** EST Estimate how much Earth would move during...Ch. 3 - In an early practice run while the rocket sled was...Ch. 3 - What is Stapps67m/sspeed in miles per hour? 30mi/h...Ch. 3 - 55. What is the magnitude of the acceleration of...Ch. 3 - 56. What is the magnitude of the acceleration of...Ch. 3 - What is the average force exerted by the...Ch. 3 - 58. What is the time interval for Stapp and his...Ch. 3 - Using proportions A proportion is defined as an...Ch. 3 - Using proportions A proportion is defined as an...Ch. 3 - Using proportions A proportion is defined as an...Ch. 3 - Using proportions A proportion is defined as an...Ch. 3 - Using proportions A proportion is defined as an...
Additional Science Textbook Solutions
Find more solutions based on key concepts
51. An elevator weighing 2500 N ascends at a constant speed of 8.0 m/s. How much power must the motor supply to...
College Physics: A Strategic Approach (4th Edition)
104. Sunlight passing through a pinhole in a piece of paper casts an image of the Sun, as shown. The image size...
Conceptual Physical Science (6th Edition)
The factor by which the speed is changes if the frequency is doubled.
Physics (5th Edition)
13.31 Planets Beyond the Solar System. On October 15, 2001, a planet was discovered orbiting around the star HD...
University Physics (14th Edition)
Write each number in scientific notation.
5. 826.4
Applied Physics (11th Edition)
Knowledge Booster
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.Similar questions
- The shower curtain rod in Figure P6.7 is called a tension rod. The rod is not attached to the wall with screws, nails, or glue, but is pressed into the wall instead. Explain why the rod remains at rest, supporting the curtain. Explain why the name is misleading and come up with a better name. FIGURE P6.7arrow_forwardIn Chapter 5, you will study a very important vector, force. Each case in Figure P3.13 shows an example of force vectors exerted on an object. These forces are all of the same magnitude F0. Assume that the forces lie in the plane of the paper. Rank the cases from greatest to smallest according to the magnitude of the total force. Note: The total force is the vector sum of the individual forces exerted on the object.arrow_forwardProblem 4. Boat in a lake. A boat floats in a lake. When the boat moves the force of resistance is proportional to the velocity of the boat. Initially the boat is at rest. A person walks from the stern to the bow of the boat. What will be the position of the boat long time after the person stopped moving?arrow_forward
- 1m 2m lm -2m- 2m 2m The crate weighs 450 kg and is supported by three cables as shown in the figure 3 m below. a. Draw a free-body diagram for point A b. Express the tension in each cable in terms of the unit vector and its unknown magnitude c. Determine the magnitude of the tension in each cable d. What is the maximum weight for a crate that can be supported if the maximum tension in any cable is 900 kg?arrow_forwardd. Force is a vector quantity and thus has both a magnitude and a direction. A vector can be represented graphically by a line drawn to scale in the direction of the line of action of the force. To distinguish between vector and scalar quantities, various ways are used. Identify and explain threeof these ways.arrow_forwardd. Force is a vector quantity and thus has both a magnitude and a direction. A vector can be represented graphically by a line drawn to scale in the direction of the line of action of the force. To distinguish between vector and scalar quantities, various ways are used. Identify and explain three of these ways.arrow_forward
- You push a grocery cart along a level floor in the presence of friction effects between the cart and the floor. a. Draw force diagrams for you, the cart, and the floor/earth. Fully label all vectorsarrow_forwardTwo-thirds of the weight of a 1500 kg car rests on the drive wheels. Part A What is the maximum acceleration of this car on a concrete surface? Express your answer to two significant figures and include the appropriate units.arrow_forwardWhich statement describes the effect of an inclined plane on the amount of force required to push an object? A. Objects require more force to push them up an inclined plane compared to a flat surfaceB. There is no way to predict the effect of an inclinded plane on the amount of force required to push an objectC. Objects require less force to push them up an inclined plane compared to a horizontal surface.D. Objects require the same amount of force to push them up an inclined plane as on a flat surfacearrow_forward
- 7arrow_forwardIf you push a box across the floor its "physics work" but if you push on the wall it's not. Which of the following choices best explains why? Question 12 options: The direction of the force on the box is not the same direction as the motion. You're applying a force to the box but you are not applying a force to the wall. You're not applying a force to the box but you are applying a force to the wall. The box is moving but the wall is not.arrow_forwardA crate is sliding down a slope. The weight of the crate is 500 N. The slope makes an angle of 30° with the horizontal. Draw a diagram to show the situation. Include arrows to represent the weight of the crate and the contact force of the slope acting on the crate. a Calculate the component of the weight down the slope. b Explain why the contact force of the slope has no component down the slope. C 5arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningPhysics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...
Physics
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Newton's Third Law of Motion: Action and Reaction; Author: Professor Dave explains;https://www.youtube.com/watch?v=y61_VPKH2B4;License: Standard YouTube License, CC-BY