A Racehorse Cannot Stand on One Leg,but When It Runs

question 12

Multiple Choice

A racehorse cannot stand on one leg,but when it runs it rarely has more than one leg on the ground.Why is a running horse more stable than a standing one?

• A)Its internal organs act like a gyroscope.
• B)Its legs tilt so the hooves fall in line with its center of gravity.
• C)It uses its neck for balance the way a tightrope walker uses a pole.
• D)Its momentum gives it stability.

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