Mastering Physics Solutions Chapter 11 Rotational Dynamics and Static Equilibrium

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https://sites.google.com/site/aplustoppernotes/mastering-physics-solutions-chapter-11-rotational-dynamics-and-static-equilibrium

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http://aplustoppernotes.blogspot.com/2018/06/mastering-physics-solutions-chapter-11.html

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https://aplustoppernotes.wordpress.com/2018/06/05/mastering-physics-solutions-chapter-11-rotational-dynamics-and-static-equilibrium/

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Chapter 11 Rotational Dynamics and Static Equilibrium Q.1CQ

Two forces produce the same torque Does it follow that they have the same magnitude? Explain

Solution:

No, we know that the torque exerted by a tangential force a distance r from the axis of rotation

is t=rF

Here, the torque depends on both the magnitude of force and on the distance from the axis of rotation at which it is applied However because the forces are the same, the torque depends

on the axis of rotationS A small force can produce the same torque as a large force, if it is applied farther from the axis of rotation

Chapter 11 Rotational Dynamics and Static Equilibrium Q.1P

To tighten a spark plug, it is recommended that a torque of 15 N · m be applied. If a mechanic tightens the spark plug with a wrench that is 25 cm long, what is the minimum force necessary to create the desired torque?

Solution:

Mastering Physics Solutio...cs and Static Equilibrium