Cross hanging from rearview mirror

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SUMMARY

The discussion centers on the forces acting on a cross hanging from a rearview mirror while a race-car driver navigates a circular path at a constant velocity. The identified forces impacting the hanging cross are gravity, tension, and centripetal force. The role of static friction in the string is acknowledged but can be disregarded in a steady-state analysis. This conclusion confirms the correct understanding of the dynamics involved in circular motion.

PREREQUISITES
  • Understanding of basic physics concepts such as forces and motion.
  • Familiarity with centripetal force and its role in circular motion.
  • Knowledge of tension in strings and its effects on hanging objects.
  • Basic grasp of static friction and its implications in steady-state conditions.
NEXT STEPS
  • Research the principles of centripetal force in circular motion.
  • Study the effects of tension in strings under varying forces.
  • Explore the concept of static friction and its relevance in physical systems.
  • Examine real-world applications of these forces in automotive dynamics.
USEFUL FOR

This discussion is beneficial for physics students, automotive engineers, and anyone interested in the dynamics of forces in circular motion.

jamessmith
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A race-car driver is driving in a circle at a fixed velocity. He has a cross hanging down from a string on his rearview mirror. Which of the listed forces impacts the hanging cross as the driver drives around a circle at a fixed velocity?

Gravity, Friction, Tension, and Centripetal Force

I say gravity, tension, and centripetal force.

Is this correct?
 
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as it is steady state you are correct as long as you can disregard the static friction within the strands of the string?
 

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