Middle School Physical Science Quiz
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A 5 kg5\,\text{kg} backpack is lifted from h=0 mh=0\,\text{m} to h=1 mh=1\,\text{m}, then from h=1 mh=1\,\text{m} to h=3 mh=3\,\text{m}. Gravity (non-contact) pulls downward the whole time. Ignoring air resistance, how does the work the student must do against gravity in the second lift compare to the first lift? Use g≈10 m/s2g\approx 10\,\text{m/s}^2.
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