Chemistry, 10.01.2020 15:31, burritomadness

Work is being done in which of these situations? all motions are at a constant velocity (including velocity = zero).

a.)jessica pushes a 25 kilogram cart a distance of 10 meters.
b.)bane carries a 20 kilogram box a distance of 50 meters.
c.)a weightlifter holds a 100 kilogram barbell over his head.
d.)ali is trying to push a truck away from the parking lot.
e.)yana carries a 5 kilogram bag a distance of 1 kilometer.

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Work is being done in which of these situations? all motions are at a constant velocity (including...