3.5 Mechanical Energy Conservation I

Pre-reading question: (MULTIPLE CHOICE) A bowling ball attached to a wire is released one inch away from someone’s face.  It swings across the room, and then back toward the person it will…
a. Gain speed on the way back and hit the person in the space
b. Stop one inch from the person’s face
c. Lose speed and not make it all the way to the person’s face

Explain your choice.

And now, here are three minutes from an MIT lecture:

Videos:

Conservation concepts:

Conservation Example 1

Conservation Example 2

Post-reading question: In at least 2 sentences, explain the demonstration at the end of the MIT lecture using conservation of mechanical energy.  It might be helpful to watch the MIT lecture again.

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