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UPSC 2002: Assertion (A): Artificial satellites are always launched from the earth in the eastward direction. Reason (R): The earth rotates from west to east and so the satellite attains the escape velocity.
(a)Both A and R are individually true and R is the correct explanation of A
(b)Both A and R are individually true but R is not a correct explanation of A
(c)A is true but R is false
(d)A is false but R is true
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Not attemptedCorrect Answer: (c) A is true but R is false
Most satellites are placed in prograde (east-ward) orbits to gain up to 465 m s⁻¹ of free velocity from Earth’s west-to-east rotation, so the assertion is accepted as true in the exam. The reason is inaccurate because rockets need only orbital velocity (~7.8 km s⁻¹), not ‘escape velocity’; therefore R is false. ([scribd.com](https://www.scribd.com/document/819879928/2002-QP-AW?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2002 Science & Technology question?▼
The correct answer is option (c): A is true but R is false. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Space Technology & Astronomy question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2002, GS Paper 1, as Question 147. It falls under Science & Technology > Space Technology & Astronomy.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Space Technology & Astronomy?▼
UPSC has asked 69 questions from Space Technology & Astronomy (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.