A ball, starting from rest at Position 1, rolls back and forth along a curved tr
ID: 1262768 • Letter: A
Question
A ball, starting from rest at Position 1, rolls back and forth along a curved track. The ball eventually stops rolling. The ball and track get a little warmer during this process.
How does the total energy of the ball and track change as the ball rolls along the track? Explain your answer without using equations.
A ball, starting from rest at Position 1, rolls back and forth along a curved track. The ball eventually stops rolling. The ball and track get a little warmer during this process. How does the total energy of the ball and track change as the ball rolls along the track? Explain your answer without using equations.Explanation / Answer
As the ball rolls, the
1. The system's average kinetic energy decreases
2. The system's average potential energy decreases
3. The system's total interal energy increases (the ball and track gets warmer as well)
As you see, some energies increased, some decreased. The point is, before and after the process, the total energy of the system REMAINS THE SAME, only, the energy is converted into other forms in the process.
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