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UPSC 2003: An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil then
(a)Remains horizontal
(b)Is inclined to the horizontal with smaller depth at the rear end
(c)Is inclined to the horizontal with larger depth at the rear end
(d)Assumes parabolic curve
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Not attemptedCorrect Answer: (c) Is inclined to the horizontal with larger depth at the rear end
When the tanker accelerates forward, the liquid experiences a pseudo-force backward; the free surface aligns perpendicular to the resultant of gravity (g) and this backward pseudo-force. Hence the surface tilts with a larger depth at the rear (toward the pseudo-force) and a smaller depth at the front, matching option (c). ([iasexamportal.com](https://iasexamportal.com/paper/IAS_General_Studies_Prelims_Paper_2003_part-2))
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What is the correct answer to this UPSC 2003 Science & Technology question?▼
The correct answer is option (c): Is inclined to the horizontal with larger depth at the rear end. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physics question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2003, GS Paper 1, as Question 37. It falls under Science & Technology > Physics.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Physics?▼
UPSC has asked 104 questions from Physics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.