Linear Momentum of System — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Linear Momentum of System.

2D Inelastic Collision with Center of Mass Velocity

high

NEET often combines concepts. A question could involve two objects colliding in 2D, sticking together, and then asking for the final velocity of the combined mass or the velocity of the center of mass. This tests both 2D vector momentum conservation and the relationship $vec{P}_{sys} = Mvec{v}_{CM}$. Students need to resolve initial momenta into components, sum them, and then use the total mass to find the final velocity vector.

Explosion of an object initially in motion

medium

While explosions from rest are common, a slightly more challenging variant involves an object already moving before it explodes into fragments. This requires calculating the initial momentum of the moving object and then equating it to the vector sum of the momenta of the fragments. It tests careful vector addition and problem setup, especially if fragments move in different directions.

Conceptual question on conditions for momentum conservation in specific scenarios

high

NEET loves to test conceptual clarity. A question might present a scenario (e.g., a block sliding on a rough surface, a ball thrown vertically upwards) and ask whether momentum is conserved, and if so, in which direction. This requires understanding that momentum is conserved only if the *net external force* is zero, and that conservation can apply to individual components if the corresponding external force component is zero.