Which object reaches the bottom of the ramp first, a cylinder or a sphere?

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SUMMARY

A cylinder and a sphere, both solid and uniform with identical mass and diameter, roll down a ramp without slipping and reach the ground simultaneously. The discussion confirms that despite the sphere's lower rotational inertia, both objects will arrive at the bottom at the same time due to the principles of rotational motion and energy conservation. This conclusion is supported by the understanding of how mass distribution affects rolling objects.

PREREQUISITES
  • Understanding of rotational inertia and its impact on motion
  • Familiarity with the concepts of rolling without slipping
  • Basic principles of energy conservation in physics
  • Knowledge of solid uniform objects in classical mechanics
NEXT STEPS
  • Study the equations of motion for rolling objects
  • Explore the concept of rotational inertia in detail
  • Investigate energy conservation in non-slipping scenarios
  • Learn about the differences in motion between various shapes (e.g., cones, disks) rolling down ramps
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Students of physics, educators teaching mechanics, and anyone interested in the dynamics of rolling objects.

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Homework Statement



A cylinder and a sphere, both solid and uniform and having the same mass and diameter, roll without slipping down the same ramp starting from rest. Both of them will reach the ground at the same time.

The Attempt at a Solution



I think the sphere will reach the ground first because has a lower rotational inertia? Is this correct?
 
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Yes, that is correct.
 

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