🔬 Science & TechnologyUPSC 2003Space & Space Technology

An oil tanker partially filled with oil 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 ​
dassumes a parabolic curve
✓ Correct answer: c) ​is inclined to the horizontal with larger depth at the rear end ​
ExplanationWhen the oil tanker accelerates forward, the oil inside experiences an inertial force (pseudo force) acting in the opposite direction to the acceleration.This causes the free surface of the oil to tilt.1. The rear end of the tanker has larger depth because the inertial force pushes the oil backward.2. The front end has smaller depth as the oil moves away from it.Thus, The free surface of the oil becomes inclined, with the rear end having a larger depth 223

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