Soon-Yi is building a mobile to hang over her baby’s crib. She hangs a 0.020 kg toy sailboat 0.010 m from the left end and a 0.015 kg toy truck 0.20 m from the right end of a bar 0.50 long. If the lever arm has negligible mass, where must the support string be placed so that the arm balances?

Soon-Yi is building a mobile to hang over her baby’s crib. She hangs a 0.020 kg toy sailboat 0.010 m from the left end and a 0.015 kg toy truck 0.20 m from the right end of a bar 0.50 long. If the lever arm has negligible mass, where must the support string be placed so that the arm balances?

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

Chapter12: Static Equilibrium And Elasticity

Section: Chapter Questions

Problem 12.3CQ: (a) Give an example in which the net force acting on an object is zero and yet the net torque is...

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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

3. Soon-Yi is building a mobile to hang over her baby’s crib. She hangs a 0.020 kg toy
sailboat 0.010 m from the left end and a 0.015 kg toy truck 0.20 m from the right end of a
bar 0.50 long. If the lever arm has negligible mass, where must the support string be
placed so that the arm balances?

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