System of Particles and Rotational Motion for NEET: PYQ trend, NCERT lines NEET repeats, free lecture

System of Particles and Rotational Motion in NEET: the numbers

85NEET / AIPMT questions in our PYQ bank (1988–2026)

32exam years with a question from this chapter

6NCERT lines NEET asked more than once

Topics NEET asks most

Topic	Questions
Moment of inertia, parallel and perpendicular axes	22
Torque and angular momentum	21
Rotational dynamics and equilibrium	17
Rolling motion	15
Centre of mass	10

NCERT lines NEET asked again and again

Read these lines from your NCERT book twice: NEET has built questions on each of them more than once.

Rolling without slipping gives a = (g sin θ)/(1 + k²/R²). The smaller k²/R² wins , whatever the mass: solid sphere beats disc, solid beats hollow.

AIPMT 2000AIPMT 2010NEET 2014

Internal forces come in equal and opposite pairs, so they cannot move the centre of mass . Two bodies starting at rest and pulling each other keep v_(CM) = 0 .

AIPMT 1997AIPMT 2010NEET 2023

With no external torque, L = Iω stays constant . If I changes, ω changes, but rotational kinetic energy usually does not stay the same.

AIPMT 2002AIPMT 2011NEET 2018

The radius of gyration is defined by I = Mk² , so k = √(I/M). Compare bodies by taking the ratio of their I/M values.

AIPMT 2004NEET 2022NEET 2023

A mass circling on a string pulled inward keeps L = mvr constant . Halve r and v doubles, so kinetic energy becomes 4 times .

AIPMT 2011

Shift the axis by d from the CM and add Md² : I = I_(CM) + Md². A disc about a point on its rim, perpendicular to it, gives (3/2)MR² .

AIPMT 2005AIPMT 2006

Free lecture by Prashant Sir

ROTATION Motion - Mechanics L-20 | NEET Physics Crash Course | NCERT Physics Class 11 · 431K views on YouTube

Free NCERT notes for System of Particles and Rotational Motion

Newton's laws extended to systems and rigid bodies: centre of mass, torque, angular momentum, moment of inertia, equilibrium and rolling. NEET asks from it regularly, most often on moment of inertia, conservation of angular momentum and rolling down an incline.

Read the chapter notes: key NCERT points, graphs, every formula with its meaning, tricks, common mistakes and NEET traps.

FAQ

How many questions come from System of Particles and Rotational Motion in NEET?

Our bank of NEET and AIPMT papers (1988–2026) has 85 questions from System of Particles and Rotational Motion, most of them from Moment of inertia, parallel and perpendicular axes, Torque and angular momentum, Rotational dynamics and equilibrium.

Which NCERT line of System of Particles and Rotational Motion has NEET asked the most?

This line has been asked 4 times in NEET/AIPMT: "Rolling without slipping gives a = (g sin θ)/(1 + k²/R²). The smaller k²/R² wins, whatever the mass: solid sphere beats disc, solid beats hollow."

Where can I study System of Particles and Rotational Motion for NEET for free?

Prashant Sir's full lecture is free on the NEET Physics Kota YouTube channel, and the chapter notes are free on Dhruv.