A 3.8 kg object is lifted 12 meters. Approximately how much work is performed during the lifting?
A 3.8 kg object is lifted 12 meters. 446.9 is performed during the lifting. W = mgh W = (3.8 Kg)(9.8 m/s²)(12 m) W = 446.88 J or 446.9 J
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Updated 111 days ago|12/30/2023 12:43:25 PM
Confirmed by Sting [12/30/2023 12:43:25 PM]
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A 7.5 kg block is placed on a table. If its bottom surface area is 0.6 m2, how much pressure does the block exert on the tabletop?
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Updated 8/16/2021 11:14:33 AM

A 7.5 kg block is placed on a table. If its bottom surface area is 0.6 m2, 122.5 Pa pressure does the block exert on the tabletop. P = F/A = mg/A = (7.5 kg)(9.8 m/s²)/(0.6 m²) = 122.5 Pa.
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