46.. A torque wrench is used to tighten a nut on a bolt. The wrench is 25 cm long, and a force of 120 N is applied at the end of the wrench as shown in Figure 9-42. Calculate the torque about the axis that passes through the bolt. Example 9-3 F = 120 N 20% 25 cm Freedman, College Physics, 3e, 2021 W. H. Freeman and Company Ο

46.. A torque wrench is used to tighten a nut on a bolt. The wrench is 25 cm long, and a force of 120 N is applied at the end of the wrench as shown in Figure 9-42. Calculate the torque about the axis that passes through the bolt. Example 9-3 F = 120 N 20% 25 cm Freedman, College Physics, 3e, 2021 W. H. Freeman and Company Ο

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

Chapter10: Rotation Of A Rigid Object About A Fixed Axis

Section: Chapter Questions

Problem 10.43P: Three identical thin rods, each of length L and mass m, are welded perpendicular to one another as...

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CHECK and THINK Our results give us a way to think about how a person might steer a unicycle. Consider the person, the unicycle, and the Earth as the system. No net torque acts on the system. Ignoring the motion of the Earth, Figure 13.37A shows the initial angular momentum of the system with the unicycle in motion: Li=Ltire. The person leans to his left so that the angular momentum of the tire rotates downward. The total angular momentum must still point to the right (Fig. 13.37B), so the angular momentum of the person must be upward to compensate. The persons angular velocity therefore points upward (parallel to his own angular momentum), and he is able to make a turn. Another way to analyze this situation is to exclude the Earth from the system and calculate the torque done by gravity. This approach is left as a homework problem. FIGURE 13.37 C Reanalyze the unicycles motion in Example 13.15 (page 382). This time, leave the Earth out of the system and explain how the torque exerted by gravity causes the unicycle to turn. Your explanation should involve a diagram.