A. a person walking on a tight-rope
B. ball on a smooth horizontal table
C. ball resting on an inverted hemisphere bowl
D. ball in the middle of a hemispherical bowl
Correct Answer: Option D
D. ball in the middle of a hemispherical bowl
A. a person walking on a tight-rope
B. ball on a smooth horizontal table
C. ball resting on an inverted hemisphere bowl
D. ball in the middle of a hemispherical bowl
Correct Answer: Option D
D. ball in the middle of a hemispherical bowl
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