A weight lifter picks up a barbell and
1. lifts it chest high
2.holds it for 30 seconds
3.puts it down slowly (but does not drop it)
Rank the amounts of work W the weight lifter performs during these three operations. Label the quantities as W1, W2, and W3. Justify your ranking order. (Hint: Think about how work is defined in terms of who is applying forces and who is doing work.)
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A weight lifter picks up a barbell and
1. lifts it chest high
2.holds it for 30 se...
1. lifts it chest high
2.holds it for 30 se...
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