a. Calculate the individual torques produced by the weights of the girl and boy on the seesaw in the figure. What is the net torque?
b. Calculate the distance a 600-N boy should sit from the fulcrum.
c. Calculate the distance a 300-N girl should sit when the boy weighs 400 N.
(a)
The individual torques produced by the weights of the girl and the boy and the net torque.
Answer to Problem 25A
The torque produced by the weights of the girl is
The torque produced by the weights of the boy is
The net torque produced is
Explanation of Solution
Given info:
The weight of the girl is
The weight of the boy is
Formula used:
The expression for the torque as follows:
Here,
Calculation:
Sketch the free body diagram of the system as shown below.
Refer to Figure.
The torque produced by the
Hence, the torque produced by the weights of the girl is
The distance x as follows:
The torque produced by the
Hence, the torque produced by the weights of the boy is
The net torque as follows:
Hence, the net torque is
Conclusion:
Thus, the torque produced by the weights of the girl is
Thus, the torque produced by the weights of the boy is
Thus, the net torque produced is
(b)
The distance of the
Answer to Problem 25A
The distance of the
Explanation of Solution
Given info:
The weight of the girl is
The weight of the boy is
Calculation:
The distance x is as follows:
Conclusion:
Thus, the distance of the
(c)
The distance of the
Answer to Problem 25A
The distance of the
Explanation of Solution
Given info:
The weight of the girl is
The weight of the boy is
Calculation:
Consider the girl sits from the fulcrum at a distance d.
Find the distance x as follows:
Conclusion:
Thus, the distance of the
Chapter 11 Solutions
Conceptual Physics: The High School Physics Program
Additional Science Textbook Solutions
College Physics: A Strategic Approach (3rd Edition)
College Physics
Conceptual Physics (12th Edition)
Cosmic Perspective Fundamentals
The Cosmic Perspective (8th Edition)
Physics: Principles with Applications
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON