Understanding Energy Loss to Heat and Friction in Bouncing Objects

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SUMMARY

The discussion confirms that when a ball is dropped on a table, it does not bounce back to the same height due to energy loss primarily attributed to heat. This energy loss occurs not from friction between the ball and the table, as there is no rubbing during the collision, but from internal friction within the ball's material and air resistance. These factors contribute to an increase in the internal energy of the ball, demonstrating the principles of energy transformation in mechanical systems.

PREREQUISITES
  • Understanding of mechanical energy and its transformations
  • Familiarity with concepts of heat transfer and internal energy
  • Basic knowledge of friction types, including static and kinetic friction
  • Awareness of air resistance and its effects on moving objects
NEXT STEPS
  • Research the principles of energy conservation in mechanical systems
  • Explore the concept of internal friction in materials and its implications
  • Learn about the effects of air resistance on different shapes and sizes of objects
  • Investigate the relationship between temperature changes and energy loss in collisions
USEFUL FOR

Physics students, mechanical engineers, and anyone interested in the dynamics of energy loss in physical systems will benefit from this discussion.

member 529879
If a ball is dropped on a table it doesn't bounce back at the same height. Is this because some energy is lost to heat? If so, is this an example of friction, or is friction only when objects are being rubbed together?
 
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Yes, mechanical energy is lost as heat (to increase internal energy).
It's not due to friction between the ball and the table (which doesn't really rub in this collision)...
but there is internal friction between the bits of material that make up the ball.
 
In addition, energy is lost to air resistance.
 

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