Centre of Mass — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Centre of Mass.

CoM of non-uniform continuous bodies

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While most NEET questions on continuous bodies assume uniform density, there's an increasing trend to test basic integration skills in physics. A question involving a rod with linearly varying mass density (e.g., $\lambda = ax+b$) or a triangular plate with varying surface density could be a slightly harder but testable concept. This would assess a deeper understanding of the integral form of the CoM formula.

CoM in 2D collisions or explosions with initial velocity

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NEET frequently combines topics. A common scenario is a projectile exploding in mid-air, where the CoM continues its parabolic path. A more complex version could involve a 2D collision where the CoM's velocity before and after the collision needs to be tracked, or an explosion of a moving object, requiring vector addition for CoM velocity. This tests both CoM and momentum conservation in a multi-dimensional context.

CoM shift due to internal movement in a closed system

high

Problems like a man walking on a boat or a monkey climbing a rope attached to a block are classic examples of CoM conservation when no external forces are present. These questions are popular because they test the conceptual understanding that internal forces do not shift the CoM, and thus the CoM's position relative to the ground remains fixed. Variations could involve multiple people or objects moving on a platform.

Conceptual questions on CoM vs CoG and CoM location

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While numerical problems are common, NEET also includes conceptual questions. Distinguishing between CoM and CoG, or identifying scenarios where the CoM lies outside the physical body (e.g., a ring, boomerang), are fundamental conceptual checks. These questions test basic understanding rather than calculation prowess.