A tight-rope walker carries a long pole which he holds across his body. The purpose of this pole is to__________?
Correct answer: D. To keep the Center of gravity always above vertically above the rope
- A. Prop him up if he falls
- B. Spread out his weight and reduce the pressure on the rope
- C. Add extra weight to keep the rope tightly stretched
- D. To keep the Center of gravity always above vertically above the rope
Explanation
The long pole helps the walker control balance by keeping the combined centre of gravity vertically above the rope. It also increases rotational inertia, giving more time to correct a tilt.
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