Answers to Practice Activity 6
1a. AnalysisThere is an elastic interaction between the rubber band and the beanbag block.
The rubber band is the source and it decreases in stored elastic energy. The source transfers mechanical energy to the receiver which is the beanbag block. The beanbag block increases in motion energy.
1b. Explanation:
The beanbag block speeds up because mechanical energy is transferred to the beanbag block from the rubber band during this elastic interaction. The beanbag block increases in motion energy and the rubber band decreases in stored elastic energy.
2a. Analysis
There is a friction interaction between the block and the table.
The block is the source and it decrease in motion energy. Both the block and the table are the receivers and they increase in thermal energy.
2b. Explanation:
The block slows down because mechanical energy is transferred from the block to the table. The block and table warm up, increasing their thermal energy, and the block slows down, decreasing its motion energy.
posted by The Professor @ 4:55 PM
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