Physics, 21.03.2020 11:34 user1234536

A hand lifts a block vertically upward at constant velocity. The work done by gravity on the block if the system consists of the block only. The work done by gravity on the block if the system consists of the block and the earth. AND WHY?

1. is zero, is zero2. is zero, is negative3. is zero, is positive4. is negative, is negative5. is positive, is positive

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A hand lifts a block vertically upward at constant velocity. The work done by gravity on the block...

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