physics

for both of these object

system1: earth and ball
if a ball is falling down, is the work done on it positive since force and displacement are in the same direction.

system 2: earth and basket
a basket is tied to a rope and is dropped then come to a full stop, then is the work done also positive as well

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  1. System 1: Yes, work is done by the gravitational field. Work done is the same as the loss of potential energy.

    System 2: Work is done while it falls, but when it stops, all that work (which became kinetic energy) is converted to heat.

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