An Object Is Released from Rest When It Is a Height

question 29

Multiple Choice

An object is released from rest when it is a height h above the surface of a planet of mass M and radius R. What is the speed of the object just before striking the surface of the planet? Neglect any air resistance. Let h = 4.0 × 10⁶ m, R = 5.0 × 10⁶ m, and M = 4.0 × 10²⁴ kg.

• A) 7.8 km/s
• B) 3.5 km/s
• C) 5.4 km/s
• D) 6.9 km/s
• E) 4.8 km/s

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Definitions:

Light Exercise

Physical activities that require less effort and energy than regular or strenuous workouts, often recommended for beginners, the elderly, or those recovering from illness.

Cognitively Younger

Describes individuals whose mental capabilities and functions appear to be younger than their actual chronological age.

Older Adults

Individuals typically aged 65 years or older, often considered seniors or the elderly.

Isotonic Exercise

Physical exercise involving movement against a constant load, where the muscle length changes to move a weight.