Physics, 13.05.2021 23:10 andresduenas72

Nancy weighed her empty backpack with a spring scale. She found that the pack weighed 8.1 N. Suppose she picks up her backpack from a desktop and lifts it through
a height of 42 cm. How much gravitational potential energy does the backpack gain?
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Nancy weighed her empty backpack with a spring scale. She found that the pack weighed 8.1 N. Suppos...