Weight is defined as the force of gravity acting on an object (Weight = mass × gravitational acceleration). While the mass of the iron ball (10 kg) remains constant everywhere, the gravitational acceleration in deep space is practically zero, as it is far from any significant celestial body. Therefore, the weight in space is approximately 10 kg × 0 = 0 kg wt.
An iron ball weighing 10 kg wt on the earth will weigh in space—
Asked in UPPCS Prelims 2008 · Topic: Mechanics (Gravitation and Central Force Motion (Kepler's Laws))
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