elpeke102p73fz3
21.01.2020 •
Physics
A. a puck hovers and glides across an air track at constant velocity.
b. a dishwasher was pulled up to a window by a rope using a pulley system.
c. a feather falls from one end of a tube to the other inside a vacuum.
d. a charged particle was pushed away by another charged particle.
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Ответ:
Option C
A feather falls from one end of a tube to the other inside a vacuum
Explanation:
In conservative force field, which in this case is a vacuum, you expect that there will be no loss of energy to air-friction. Therefore, when a feather falls from one end of the tube to the other side which is a vacuum, we expect no energy loss. Conservative forces are the forces that are path-independent. This implies that in a closed loop, the total work done is zero. Considering the options given, only feather falls from one end of a tube to the other inside a vacuum meets the criteria
Ответ: