A weightlifter holds a 2,000 N barbell 1 meter above the ground. One end of a 2-meter-long chain hangs from the center of the barbell. The chain has a total weight of 500 N. How much work (in J) is required to lift the barbell to a height of 2 m? J What is the average force (average with respect to height of the barbell from the ground) exerted by the weightlifter in the process? N

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Chapter8: Potential Energy And Conservation Of Energy
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A weightlifter holds a 2,000 N barbell 1 meter above the ground. One end of a 2-meter-long chain hangs from the center of the barbell. The chain has total
weight of 500 N. How much work (in J) is required to lift the barbell to a height of 2 m?
J
What is the average force (average with respect to height of the barbell from the ground) exerted by the weightlifter in the process?
N
Transcribed Image Text:A weightlifter holds a 2,000 N barbell 1 meter above the ground. One end of a 2-meter-long chain hangs from the center of the barbell. The chain has total weight of 500 N. How much work (in J) is required to lift the barbell to a height of 2 m? J What is the average force (average with respect to height of the barbell from the ground) exerted by the weightlifter in the process? N
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