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On which of the following objects does gravity do the most work?
A 20 kg box sliding down a 6-m long ramp inclined 35°.
A 35 kg box lifted 2 m onto the back of a truck.
A 30 kg box that is dropped 2 m off the back of a truck.
A 20 kg child going down a 3 m high slide.
All have the same amount of work done by gravity.